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Event Notification Report for August 31, 1999

                    U.S. Nuclear Regulatory Commission
                              Operations Center

                              Event Reports For
                           08/30/1999 - 08/31/1999

                              ** EVENT NUMBERS **

35984  36018  36086  36087  36088  36089  36090  36091  

!!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED  !!!!!!!
+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   35984       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: COMANCHE PEAK            REGION:  4  |NOTIFICATION DATE: 08/02/1999|
|    UNIT:  [1] [2] []                STATE:  TX |NOTIFICATION TIME: 17:21[EDT]|
|   RXTYPE: [1] W-4-LP,[2] W-4-LP                |EVENT DATE:        08/02/1999|
+------------------------------------------------+EVENT TIME:        15:53[CDT]|
| NRC NOTIFIED BY:  SEWEEL                       |LAST UPDATE DATE:  08/30/1999|
|  HQ OPS OFFICER:  CHAUNCEY GOULD               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |TOM STETKA           R4      |
|10 CFR SECTION:                                 |                             |
|AOUT 50.72(b)(1)(ii)(B)  OUTSIDE DESIGN BASIS   |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          Y       100      Power Operation  |100      Power Operation  |
|2     N          Y       100      Power Operation  |100      Power Operation  |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| PLATFORM GRATING CLAMPS(FASTENERS) APPEAR NOT TO BE SEISMICALLY QUALIFIED.   |
|                                                                              |
| THE LICENSEE HAS DETERMINED THAT THE PLATFORM GRATING CLAMPS DO NOT APPEAR   |
| TO HAVE BEEN QUALIFIED FOR THE REQUIREMENTS OF A SEISMIC CATEGORY 1          |
| COMPONENT WHEN LOADED.  WITH THE GRATINGS UNLOADED, HOWEVER, THIS CONDITION  |
| DOES NOT AFFECT THE ABILITY OF SAFETY RELATED SYSTEMS TO PERFORM THERE       |
| INTENDED FUNCTIONS DURING A DESIGN BASIS EARTHQUAKE.   ENGINEERING IS        |
| CONTINUING TO EVALUATE THIS CONDITION.                                       |
|                                                                              |
| THE RESIDENT INSPECTOR WILL BE NOTIFIED                                      |
|                                                                              |
| * * * RETRACTED AT 2221 EDT ON 8/25/99 BY TIM CLOUSER TO FANGIE JONES * * *  |
|                                                                              |
| "After further review of the condition (event # 35984) reported on August    |
| 2,1999, TXU did not identify any deviation from the design basis             |
| requirements of the plant as defined in 10CFR50.2.  Although the basic       |
| premise of the conservative reporting of this issue was that a "test         |
| failed", it was later noted that the newly tested configuration was not the  |
| as built configuration.  Specifically, the new test configuration used an    |
| EPI clamp versus                                                             |
| the friction clamps actually installed in the field.  In addition, plant     |
| drawings and procedures already prohibited live loads in the areas that were |
| deemed susceptible to the conditions identified in the initial corrective    |
| action document.  Therefore, the platforms still maintained their ability to |
| perform their specified safety functions, are not a condition outside of the |
| design basis, and not reportable under 10CFR50.72/73.  Accordingly, this     |
| report is hereby retracted."                                                 |
|                                                                              |
| The licensee notified the NRC Resident Inspector and the R4DO (Phil Harrell) |
| was informed by the HOO.                                                     |
|                                                                              |
| * * * UPDATE 2138 8/30/1999 FROM NEMEYER TAKEN BY STRANSKY * * *             |
|                                                                              |
| "This is a clarification to the retraction reported on August 25,1999,       |
| associated with Event # 35984 reported on August 2,1999.                     |
|                                                                              |
| "After further review of the condition TXU did not identify any deviation    |
| from the design basis requirements of the plant as defined in 10CFR50.2.     |
| Although the basic premise of the conservative reporting of this issue was   |
| that a 'test failed', it was later noted that the newly tested configuration |
| was not the as built configuration. Based on a review of the test and its    |
| implications, engineering judgement [consistent with guidance provided in    |
| NUREG 1022 Rev. 1 and GL-91-18 Rev.1] has concluded that there is a          |
| reasonable expectation that the platforms would have continued to fulfill    |
| their safety function, and does not represent a condition outside of design  |
| basis of the plant pursuant to 10CFR50.72/73. However, TXU has strengthened  |
| its control associated with live loads in the plant as a conservative        |
| measure.                                                                     |
|                                                                              |
| "Because the information gathered during this review and evaluation of the   |
| platforms may be of a generic interest to the industry, TXU will report this |
| issue via a voluntarily LER."                                                |
|                                                                              |
| Notified R4DO (Cain).                                                        |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Fuel Cycle Facility                              |Event Number:   36018       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: PORTSMOUTH GASEOUS DIFFUSION PLANT   |NOTIFICATION DATE: 08/11/1999|
|   RXTYPE: URANIUM ENRICHMENT FACILITY          |NOTIFICATION TIME: 14:46[EDT]|
| COMMENTS: 2 DEMOCRACY CENTER                   |EVENT DATE:        08/10/1999|
|           6903 ROCKLEDGE DRIVE                 |EVENT TIME:        16:00[EDT]|
|           BETHESDA, MD 20817    (301)564-3200  |LAST UPDATE DATE:  08/30/1999|
|    CITY:  PIKETON                  REGION:  3  +-----------------------------+
|  COUNTY:  PIKE                      STATE:  OH |PERSON          ORGANIZATION |
|LICENSE#:  GDP-2                 AGREEMENT:  N  |BRUCE BURGESS        R3      |
|  DOCKET:  0707002                              |JOHN HICKEY          NMSS    |
+------------------------------------------------+                             |
| NRC NOTIFIED BY:  JIM McCLEERY                 |                             |
|  HQ OPS OFFICER:  LEIGH TROCINE                |                             |
+------------------------------------------------+                             |
|EMERGENCY CLASS:          N/A                   |                             |
|10 CFR SECTION:                                 |                             |
|OCBB 76.120(c)(2)(ii)    EQUIP DISABLED/FAILS   |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+------------------------------------------------------------------------------+

                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| FAILURE OF 13 HIGH PRESSURE FIRE WATER SPRINKLER SYSTEMS TO MEET SYSTEM      |
| OPERABILITY REQUIREMENTS  (24-Hour Report)                                   |
|                                                                              |
| The following text is a portion of a facsimile received from Portsmouth:     |
|                                                                              |
| "On 08/10/99 at approximately 1600 hours, the Plant Shift Superintendent     |
| (PSS) was notified that 13 sprinkler systems associated with the High        |
| Pressure Fire Water (HPFW) system were not capable of meeting system         |
| operability requirements.  This condition was discovered as a result of an   |
| engineering review of individual sprinkler heads that had previously been    |
| identified as exhibiting corrosion around the valve seat.  The engineering   |
| review was conducted following the discovery that similar corrosion problems |
| experienced at the Paducah Gaseous Diffusion Plant resulted in sprinkler     |
| heads being unable to actuate at normal pressure.  An initial screening of   |
| PORTS sprinkler heads known to exhibit corrosion was conducted, and systems  |
| where the potential for two or more adjacent heads to be corroded were       |
| inspected.  This identified 11 systems in the X-333 and 2 systems in the     |
| X-326 that did not meet the sprinkler system operability requirement that no |
| two adjacent sprinkler heads be inoperable."                                 |
|                                                                              |
| "The PSS declared the affected sprinkler systems inoperable, and TSR         |
| required actions were completed.  Further inspections of sprinkler systems   |
| are planned.  This report will be updated if additional sprinkler systems    |
| are determined to be inoperable."                                            |
|                                                                              |
| "There was no loss of hazardous/radioactive material or                      |
| radioactive/radiological contamination  exposure as a result of this         |
| event."                                                                      |
|                                                                              |
| Portsmouth personnel notified the NRC resident inspector as well as the      |
| onsite Department of Energy representative.                                  |
|                                                                              |
| *** UPDATE ON 8/19/99 AT 2327 FROM HALCOMB TO POERTNER ***                   |
|                                                                              |
| During continuing walkdowns, HPFW system #398 was discovered with two or     |
| more (3) adjacent sprinkler heads with mineral deposits.  This HPFW          |
| sprinkler was declared inoperable at 1038 hours and was repaired at 1407     |
| hours.                                                                       |
|                                                                              |
| Portsmouth personnel notified the NRC resident inspector.                    |
|                                                                              |
| * * * UPDATE 1415EDT ON 8/28/99 FROM JIM McCLEERY TO S. SANDIN * * *         |
|                                                                              |
| The following information was provided as an update to this report:          |
|                                                                              |
| "During continuing walk downs of the HPFW system, systems 194, 196, 197,     |
| 211, 212 were found with two or more adjacent sprinkler heads unable to meet |
| system operability.  Systems were made inoperable at 1452 on 8/27/99.  All   |
| sprinklers were repaired and system operability made at 0550 8/26/99."       |
|                                                                              |
| Portsmouth personnel informed the NRC resident inspector.  The NRC           |
| operations officer notified the R3DO (Leach) and NMSS EO (Piccone).          |
|                                                                              |
| UPDATE 2337 8/30/1999 FROM McCLEERY TAKEN BY STRANSKY * * *                  |
|                                                                              |
| "During continuing walkdowns of the HPFW system, seven additional systems    |
| were found with two or more adjacent sprinkler heads unable to meet system   |
| operability. Six systems were in the X-333 and one in the X-330. These       |
| systems were made inoperable starting at 1100 8/30/99 and repairs are being  |
| performed at this time."                                                     |
|                                                                              |
| Notified R3DO (Hills).                                                       |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   36086       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: BRUNSWICK                REGION:  2  |NOTIFICATION DATE: 08/30/1999|
|    UNIT:  [1] [2] []                STATE:  NC |NOTIFICATION TIME: 00:30[EDT]|
|   RXTYPE: [1] GE-4,[2] GE-4                    |EVENT DATE:        08/29/1999|
+------------------------------------------------+EVENT TIME:        23:39[EDT]|
| NRC NOTIFIED BY:  WILLIAMS                     |LAST UPDATE DATE:  08/30/1999|
|  HQ OPS OFFICER:  CHAUNCEY GOULD               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |SCOTT SPARKS         R2      |
|10 CFR SECTION:                                 |                             |
|AESS 50.72(b)(1)(v)      EMERGENCY SIREN INOP   |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          N       0        Hot Shutdown     |0        Hot Shutdown     |
|2     N          N       0        Hot Shutdown     |0        Hot Shutdown     |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| EMERGENCY SIRENS INOPERABLE  (Refer to event  numbers 36084 and 36087 for    |
| related events.)                                                             |
|                                                                              |
| THE LICENSEE REPORTED THAT ALL (FIVE) OF THEIR EMERGENCY SIRENS IN NEW       |
| HANFORD COUNTY ARE INOPERABLE.  ALSO, TWO SIRENS IN BRUNSWICK COUNTY ARE     |
| INOPERABLE.  THE PROBLEM IS BEING INVESTIGATED.                              |
|                                                                              |
| THE NRC RESIDENT INSPECTOR WAS NOTIFIED BY THE LICENSEE.                     |
|                                                                              |
| ******************** UPDATE AT 0809 ON 08/30/99 FROM JAMES BURKE TO TROCINE  |
| ********************                                                         |
|                                                                              |
| During a hurricane update provided by the licensee, the licensee reported    |
| that all 5 emergency sirens in New Hanover County remain inoperable and that |
| 7 of 30 emergency sirens in Brunswick county are inoperable.                 |
|                                                                              |
| The NRC operations center notified the R2DO (Sparks).                        |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   36087       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: BRUNSWICK                REGION:  2  |NOTIFICATION DATE: 08/30/1999|
|    UNIT:  [1] [2] []                STATE:  NC |NOTIFICATION TIME: 03:50[EDT]|
|   RXTYPE: [1] GE-4,[2] GE-4                    |EVENT DATE:        08/30/1999|
+------------------------------------------------+EVENT TIME:        02:35[EDT]|
| NRC NOTIFIED BY:  JENKINS                      |LAST UPDATE DATE:  08/30/1999|
|  HQ OPS OFFICER:  CHAUNCEY GOULD               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |SCOTT SPARKS         R2      |
|10 CFR SECTION:                                 |                             |
|APRE 50.72(b)(2)(vi)     OFFSITE NOTIFICATION   |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          N       0        Hot Shutdown     |0        Hot Shutdown     |
|2     N          N       0        Hot Shutdown     |0        Hot Shutdown     |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| THE LICENSEE PLANS TO NOTIFY THE STATE OF NORTH CAROLINA THAT THEY MAY HAVE  |
| VIOLATED THEIR NPDES (NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM)       |
| PERMIT.  (Refer to event  numbers 36084 and 36086 for related events.)       |
|                                                                              |
| PLANT OPERATORS OPENED THE SITE STORM DRAIN COLLECTOR BASIN DISCHARGE VALVES |
| TO THE CIRCULATING WATER DISCHARGE CANAL.  THESE VALVES BYPASS THE NORMAL    |
| PATH TO THE STABILIZATION POND AND CONSTITUTE A POTENTIAL UNMONITORED        |
| RADIOACTIVE LIQUID RELEASE.  THESE VALVES WERE OPENED DUE TO THE EXCESSIVE   |
| RAIN ASSOCIATED WITH HURRICANE DENNIS, AND THEY WILL BE CLOSED WHEN THE RAIN |
| SUBSIDES.  THIS CONDITION REQUIRES THE LICENSEE TO NOTIFY THE STATE BECAUSE  |
| OF THEIR NPDES PERMIT.                                                       |
|                                                                              |
| THE NRC RESIDENT INSPECTOR WAS NOTIFIED BY THE LICENSEE.                     |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|General Information or Other                     |Event Number:   36088       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| REP ORG:  STATE OF MISSISSIPPI                 |NOTIFICATION DATE: 08/30/1999|
|LICENSEE:  BOND PAVING COMPANY, INC.            |NOTIFICATION TIME: 09:09[EDT]|
|    CITY:  GULFPORT                 REGION:  2  |EVENT DATE:        08/30/1999|
|  COUNTY:                            STATE:  MS |EVENT TIME:        08:00[CDT]|
|LICENSE#:  MS638-01              AGREEMENT:  Y  |LAST UPDATE DATE:  08/30/1999|
|  DOCKET:                                       |+----------------------------+
|                                                |PERSON          ORGANIZATION |
|                                                |SCOTT SPARKS         R2      |
|                                                |JOHN HICKEY          NMSS    |
+------------------------------------------------+                             |
| NRC NOTIFIED BY:  ROBERT NELSON                |                             |
|  HQ OPS OFFICER:  LEIGH TROCINE                |                             |
+------------------------------------------------+                             |
|EMERGENCY CLASS:          N/A                   |                             |
|10 CFR SECTION:                                 |                             |
|NAGR                     AGREEMENT STATE        |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+------------------------------------------------------------------------------+

                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| AGREEMENT STATE REPORT OF A TROXLER GAUGE STOLEN FROM BOND PAVING COMPANY,   |
| INC., LOCATED IN GULFPORT, MISSISSIPPI                                       |
|                                                                              |
| At approximately 0800 CDT on 08/30/99, Bond Paving Company, Inc. (located in |
| Gulfport, Mississippi) notified the State of Mississippi, Division of        |
| Radiological Health, of a stolen Troxler gauge.  Apparently, the gauge       |
| (which was inside its storage container) was stolen some time over the       |
| weekend along with a truck and some computer equipment.  The gauge (model    |
| number 3440, serial number 28210) contained 8 mCi of cesium-137 (serial      |
| number 750-2160) and 40 mCi of americium-241/beryllium (serial number        |
| 47-2489).                                                                    |
|                                                                              |
| The licensee notified the local police department.                           |
|                                                                              |
| (Call the NRC operations officer for a state contact telephone number and    |
| the address of the licensee.)                                                |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   36089       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: HATCH                    REGION:  2  |NOTIFICATION DATE: 08/30/1999|
|    UNIT:  [1] [2] []                STATE:  GA |NOTIFICATION TIME: 09:57[EDT]|
|   RXTYPE: [1] GE-4,[2] GE-4                    |EVENT DATE:        08/30/1999|
+------------------------------------------------+EVENT TIME:        09:32[EDT]|
| NRC NOTIFIED BY:  BUTLER                       |LAST UPDATE DATE:  08/30/1999|
|  HQ OPS OFFICER:  CHAUNCEY GOULD               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |SCOTT SPARKS         R2      |
|10 CFR SECTION:                                 |                             |
|AARC 50.72(b)(1)(v)      OTHER ASMT/COMM INOP   |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          Y       100      Power Operation  |100      Power Operation  |
|2     N          Y       98       Power Operation  |98       Power Operation  |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| THE PLANT LOST PRIMARY AND BACKUP NOAA WEATHER RADIO SYSTEM                  |
|                                                                              |
| THE PLANT WAS NOTIFIED AT 0932 THAT BOTH PRIMARY AND BACKUP NOAA  WEATHER    |
| RADIO SIGNALS WERE LOST.  THE SIGNAL CAME BACK WHILE SECURITY WAS ATTEMPTING |
| TO RESTORE IT, BUT THE CAUSE OF THE PROBLEM WAS NOT DETERMINED AND AN        |
| INVESTIGATION IS ONGOING.  THE RADIO WAS OUT OF SERVICE FROM 0932 TO 0950    |
| AND IS CURRENTLY STILL OPERABLE.                                             |
|                                                                              |
| THE RESIDENT INSPECTOR WILL BE INFORMED AND THE STATE HAS BEEN NOTIFIED      |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   36090       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: HARRIS                   REGION:  2  |NOTIFICATION DATE: 08/30/1999|
|    UNIT:  [1] [] []                 STATE:  NC |NOTIFICATION TIME: 11:12[EDT]|
|   RXTYPE: [1] W-3-LP                           |EVENT DATE:        08/30/1999|
+------------------------------------------------+EVENT TIME:        10:52[EDT]|
| NRC NOTIFIED BY:  ABELL                        |LAST UPDATE DATE:  08/30/1999|
|  HQ OPS OFFICER:  CHAUNCEY GOULD               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |SCOTT SPARKS         R2      |
|10 CFR SECTION:                                 |                             |
|AESS 50.72(b)(1)(v)      EMERGENCY SIREN INOP   |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          Y       100      Power Operation  |100      Power Operation  |
|                                                   |                          |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| LOSS OF OPERABILITY OF SEVEN EMERGENCY SIRENS IN HARNETT COUNTY, N.C.        |
|                                                                              |
| THE PLANT DISCOVERED THE ABILITY TO ACTIVATE THE SEVEN PUBLIC WARNING SIRENS |
| IN HARNETT COUNTY, N.C. WAS LOST FOR A PERIOD OF TEN MINUTES (FROM 0730-0740 |
| @ 8/30/99).  THIS WAS DUE TO ELECTRICAL POWER BEING LOST TO BOTH THE PRIMARY |
| AND BACKUP REPEATER TOWERS BECAUSE OF SEVERE WEATHER.  ALTERNATE POWER WAS   |
| ESTABLISHED AT 0740 AND THE PRIMARY REPEATER WAS RETURNED TO SERVICE AT      |
| 0900.                                                                        |
|                                                                              |
| THE RESIDENT INSPECTOR WAS NOTIFIED.                                         |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   36091       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: COOPER                   REGION:  4  |NOTIFICATION DATE: 08/31/1999|
|    UNIT:  [1] [] []                 STATE:  NE |NOTIFICATION TIME: 02:21[EDT]|
|   RXTYPE: [1] GE-4                             |EVENT DATE:        08/30/1999|
+------------------------------------------------+EVENT TIME:        22:22[CDT]|
| NRC NOTIFIED BY:  GREEN                        |LAST UPDATE DATE:  08/31/1999|
|  HQ OPS OFFICER:  CHAUNCEY GOULD               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |CHARLES CAIN         R4      |
|10 CFR SECTION:                                 |                             |
|AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION    |                             |
|NLCO                     TECH SPEC LCO A/S      |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          Y       100      Power Operation  |100      Power Operation  |
|                                                   |                          |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| FAILURE OF A SINGLE TRAIN SYSTEM THAT IS REQUIRED TO MITIGATE THE            |
| CONSEQUENCES OF AN ACCIDENT                                                  |
|                                                                              |
| On 8/30/99 at 2222 while performing maintenance on SW-MOV-650MV, Reactor     |
| Equipment Cooling (REC) heat exchanger "A" Service Water (SW) Outlet Valve,  |
| SW-MOV-650MV was manually opened while disconnecting Limit Switches. The     |
| valve was opened to a point that allowed 2475 Gallons Per Minute (GPM) of    |
| service water flow thru the "A" REC heat exchanger.  Service water flow      |
| greater than 1200 GPM thru the "A" REC heat exchanger results in the "A"     |
| Service Water subsystem being inoperable (LCO 3.7.2) which requires          |
| restoration of the "A" Service Water subsystem within 30 days.  LCO 3.8.1    |
| was entered for Diesel Generator 1 (DG1) because it was declared inoperable  |
| due to the Service Water being inoperable. The Control Room Emergency        |
| Filtration System (CREFS), which is a single train system, was aligned to a  |
| bus that would be powered from DG1 in the event of an accident.  This        |
| condition resulted in CREFS also being declared inoperable (LCO 3.7.4)       |
|                                                                              |
| When the increased flow though the "A" REC heat exchanger was discovered by  |
| a Control Room Operator, the Valve Technicians performing the maintenance    |
| were instructed to manually close SW-MOV-650MV until Service Water flow      |
| through the "A" REC Heat Exchanger was reduced below 1200 GPM, which was     |
| completed at 2238. All of the previously mentioned LCO's were also exited at |
| this time.                                                                   |
|                                                                              |
| At the time this event occurred both sources of offsite power were available |
| and DG2 was determined to not be affected by this condition.                 |
|                                                                              |
| The Resident Inspector was notified.                                         |
+------------------------------------------------------------------------------+