Event Notification Report for April 27, 1999
U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
04/26/1999 - 04/27/1999
** EVENT NUMBERS **
35601 35612 35630 35632 35633 35634 35635 35636
!!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!!
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 35601 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: SUSQUEHANNA REGION: 1 |NOTIFICATION DATE: 04/18/1999|
| UNIT: [1] [] [] STATE: PA |NOTIFICATION TIME: 01:41[EDT]|
| RXTYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 04/17/1999|
+------------------------------------------------+EVENT TIME: 22:14[EDT]|
| NRC NOTIFIED BY: DON ROLAND |LAST UPDATE DATE: 04/26/1999|
| HQ OPS OFFICER: DOUG WEAVER +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |DAN HOLODY R1 |
|10 CFR SECTION: | |
|AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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
+------------------------------------------------------------------------------+
| UNIT 1 HAD LESS THAN THREE OPERABLE DIESEL GENERATORS FOR A SHORT PERIOD OF |
| TIME. |
| |
| During restoration from loss of coolant accident/loss of offsite power |
| (LOCA/LOOP) Division II testing on Unit 2, which is shutdown, operators |
| inadvertently placed the 'D' Diesel Generator Synchronization Auto Control |
| Select Switch to Bypass with the 'B' Diesel Generator already in Bypass per |
| plant procedures. This action requires the diesel be declared inoperable. |
| The action was immediately identified, and the switch on the 'D' Diesel was |
| returned to Normal. The total time that two diesel generators were |
| inoperable was less than 1 minute. This left Unit 1 with only the 'A' and |
| 'C' Diesel Generators operable. |
| |
| The licensee plans to notify the NRC resident inspector. |
| |
| ******************** UPDATE AT 1720 ON 04/26/99 FROM JEFF HELSEL TO TROCINE |
| ******************** |
| |
| The licensee is retracting this event notification. |
| |
| The following text is a portion of a facsimile received from the licensee: |
| |
| "Diesel Generator 'D' remained operable and fully capable of performing its |
| intended safety functions on 04/17/99 at approximately 2214 when the 43SYN |
| switch was placed in bypass. This occurred during the performance of Unit 2 |
| Division II LOCA/LOOP testing. At the time of this condition, the diesel |
| was running in the emergency (isochronous) mode of operation supplying the |
| 2D [emergency safeguards system (ESS)] bus. Placing the Synchronization |
| Auto Control Select Switch (43SYN) to bypass enables manual control of both |
| the speed and voltage setpoints to enable paralleling back to offsite power. |
| It does not place the diesel in the droop mode. With the 43SYN in normal, a |
| fixed resistance for frequency and a fixed motor-operated potentiometer |
| resistance for voltage is input into the circuitry. Placing the switch in |
| bypass maintains these same resistance values and enables circuits for |
| manually adjusting frequency and voltage. As long as manipulation of the |
| controlling switches does not occur, the values remain at their initial |
| setting. Post-event interviews with the [plant control operator] in control |
| revealed [that] no adjustments were made. That is to say that frequency |
| will remain at 60 Hz and will return to 60 Hz following picking up or |
| shedding of loads. The same is true of voltage. Initial voltage was 4,250 |
| when the switch was in normal and remained at 4,250 following placing in |
| bypass. Voltage will return to the initial value following load pickup or |
| shedding. The transient recovery time for both frequency and voltage is |
| expected to be identical for both bypass and normal positions under these |
| specific conditions. This conclusion of operability is based on a detailed |
| review of system circuitry, system design features and a review of 2D ESS |
| bus voltage data at the time of the occurrence." |
| |
| The licensee notified the NRC resident inspector. The NRC operations |
| officer notified the R1DO (Anderson). |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|General Information or Other |Event Number: 35612 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| REP ORG: MA DEPT OF PUBLIC HEALTH RCP |NOTIFICATION DATE: 04/21/1999|
|LICENSEE: AEA TECHNOLOGIES QSA, INC |NOTIFICATION TIME: 15:00[EDT]|
| CITY: BURLINGTON REGION: 1 |EVENT DATE: 04/21/1999|
| COUNTY: STATE: MA |EVENT TIME: 14:00[EDT]|
|LICENSE#: AGREEMENT: Y |LAST UPDATE DATE: 04/26/1999|
| DOCKET: |+----------------------------+
| |PERSON ORGANIZATION |
| |MOHAMED SHANBAKY R1 |
| |FREDERICK COMBS NMSS |
+------------------------------------------------+JOSEPH GIITTER IRO |
| NRC NOTIFIED BY: KEN TRAEGDE |DONNA MARIE PEREZ IP |
| HQ OPS OFFICER: DICK JOLLIFFE |LEN WERT R2 |
+------------------------------------------------+DALE POWERS R4 |
|EMERGENCY CLASS: N/A | |
|10 CFR SECTION: | |
|NAGR AGREEMENT STATE | |
|NOCM COMM ASST BRIEF | |
| | |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| - SHIPMENT OF 8 Ir-192 SOURCES (866 CURIES TOTAL) FROM BURLINGTON, MA, |
| OVERDUE IN MEXICO - |
| |
| At 1500 EDT on 04/21/99, Ken Traegde of the Massachusetts Department of |
| Public Health Radiation Control Program (RCP) located in Boston, |
| Massachusetts, reported that on 04/16/99, AEA Technology QSA, Inc., located |
| in Burlington, Massachusetts, shipped a Model-855 source changer loaded with |
| eight Iridium-192 sources (totaling 866 curies) via Federal Express to |
| Vicont S.A. De C.V. located in Toluca, Mexico. The undamaged package had a |
| transport index of 1.4 (normal readings of 1.4 mR/hour at 1 meter and 55 |
| mR/hour at the surface) at the time of shipment. |
| |
| The shipment was scheduled to arrive in Mexico on 04/17/99. As of 1400 EDT |
| on 04/21/99, the recipient (Vicont S.A. De C.V.) had received the shipping |
| papers but not the container. The shipper and Federal Express have launched |
| a full search for the package. The Federal Express Hazardous Material |
| Investigation Team has conducted a physical search of Express Depots in |
| Boston, Memphis, Los Angeles, and Mexico. |
| |
| The license numbers are: SU-1485, 12-8361, 52-0243, 54-0237, and 58-0242. |
| |
| The NRC operations officer notified the Department of Transportation via the |
| National Response Center (Gauthier); Report number 481132. |
| |
| (Contact the NRC operations officer for applicable telephone numbers.) |
| |
| *********************************** UPDATE AT 1345 ON 04/22/99 BY JONES |
| *********************************** |
| |
| The NRC entered the Monitoring Phase of Normal Mode at 1345 on 04/22/99. |
| The NRC operations officer notified the R1DO (Shanbaky), Region 1 (Miller), |
| IRO (Congel and Giitter), NMSS (Paperiello), RCT (Weinstein), OPA (Gagner), |
| EDO's office (Charleen Raddatz), and Chairman's office (Holian). The RCT |
| notified the Federal Emergency Management Agency (Dan Rishe), Department of |
| Energy (Thomas Yates), Environmental Protection Agency (Ms. Reddy), |
| Department of Agriculture (Bob Conley), Department of Health and Human |
| Services (James Raab), and Department of Transportation (Rick Boyle). |
| |
| *********************************** UPDATE AT 1600 ON 04/22/99 BY JONES |
| *********************************** |
| |
| A Commissioner's Assistants Briefing was conducted at 1600 on 04/22/99. The |
| following notifications were made (* office did not participate): IRO (Joe |
| Giitter and Eric Weinstein), Chairman Jackson (Dan Gillen), Commissioner |
| Dicus (Joel Lubenau), Commissioner Diaz (Patrick Castleman), Commissioner |
| McGaffigan (Janet Schlueter), Commissioner Merrifield (JohnThoma), EDO (*Dan |
| Martin), DEDE (*Jocelyn Mitchell), NMSS (Don Cool and Carl Paperiello), NMSS |
| EO (Fred Combs), R1DO (Mohamed Shanbaky), OPA (Joe Gilland), CAO (Thomas |
| Madden), SECY (Andrew Bates), OSP (Paul Lohaus), OIP (Ron Hauber), Region 1 |
| (Felicia Hinson and Jim Wiggins, etc), and Region 2 (Doug Collins, Chuck |
| Hosey, and Dick Woodruff). The briefer was Fred Combs of NMSS. |
| |
| At 1610, the NRC operations officer played a tape of briefing for EDO (Dan |
| Martin) and DEDE (Jocelyn Mitchell). |
| |
| ****************************** UPDATE AT 1230 ON 04/23/99 BY TROCINE AND |
| JONES ****************************** |
| |
| A conference call was conducted at 1230 on 04/23/99 to update the status of |
| this event. The following NRC offices participated (among others): IRO |
| (Himes), NMSS (Brach, Combs, and Cook), Region 1 (Lloyd), Region 2 (Collins |
| and Woodruff), Region 4 (Andrews), OPA (Hayden), OIP (Lieberman), OSP |
| (Lohaus), and EDO (Raddatz). In addition, the following agencies |
| participated: Department of Transportation (Rick Boyle), Massachusetts |
| Department of Public Health RCP (Ken Traegde), Federal Express (Scott Mugno, |
| Pat Oppenheimer, and Roy Parker), State of Tennessee (Alan Grewe), Tennessee |
| Division of Radiation Health (Eddy Nanney), AEA Technology QSA, Inc. (Eric |
| Okvist), and Environmental Protection Agency located in Atlanta (Paul |
| Wagner). |
| |
| During this conference call, representatives of Federal Express reported |
| that they are confident that the shipment of eight Iridium-192 sources left |
| Boston. They issued an 'all-points' search order, faxed a description to |
| all 'logical' locations, and conducted repeat physical searches in Memphis, |
| Boston, and Mexico, all without locating the shipment to date. (The Los |
| Angeles depot was not searched as had been reported on 04/21/99.) |
| Massachusetts and Tennessee health authorities conducted radiological |
| surveys in Boston and Memphis on 04/22/99 with negative results. |
| |
| Rick Boyle of the Department of Transportation notified the competent |
| authority in Mexico, and Federal Express requested a detailed search of the |
| Customs facilities in Mexico City. |
| |
| The next conference call is scheduled for 1230 EDT on Wednesday, 04/28/99. |
| |
| ************************* UPDATE AT 1333 ON 04/26/99 FROM TRAEGDE TO TROCINE |
| ************************* |
| |
| At 0619 EDT on 04/26/99, Federal Express confirmed that the serial number on |
| a Model-855, Type-B package found at the Stansted Airport (located outside |
| of London, England) matched the serial number for the missing package |
| containing the eight Iridium-192 sources. The Massachusetts Department of |
| Public Health RCP was informed of this discovery by AEA Technology QSA, |
| Inc., at 0933 EDT on 04/26/99. The package was reported to be intact and |
| undisturbed. The carrier (Federal Express) contacted the shipper (AEA |
| Technology QSA, Inc.), and the shipper requested that the package be |
| forwarded to its intended destination. Accordingly, the package will be |
| shipped from Stansted Airport to Toluca, Mexico, via Memphis, Tennessee. |
| Federal Express informed the Massachusetts Department of Public Health RCP |
| that the package is expected to arrive in Memphis, Tennessee, by tomorrow |
| morning (04/27/99). |
| |
| The Massachusetts Department of Public Health RCP notified NRC Region 1 |
| (Duncan White). The NRC Operations Officer notified the R1DO (Anderson); |
| R2DO (Wert); R4DO (Graves); NMSS (Combs); IRO (Giitter, Miller, and Congel); |
| RCT (Bailey). |
| |
| *********************************** UPDATE AT 1600 ON 04/26/99 BY TROCINE |
| *********************************** |
| |
| A conference call was conducted at 1600 on 04/26/99 to update the status of |
| this event. The following NRC offices participated (*office did not |
| participate): IRO (Giitter), RCT (Bailey), NMSS (Brach and Cool), Region 1 |
| (Kinneman), Region 2 (Hosey), Region 4 (*Graves), Region 1 Public Affairs |
| (*Screnci and *Sheehan), HQ OPA (Beecher), OIP (Lieberman), OSP (Bolling and |
| Lohaus), and EDO (Raddatz). In addition, the following agencies |
| participated: Massachusetts Department of Public Health RCP (Ken Traegde), |
| State of Tennessee (Alan Grewe and Mike Mobley), and Tennessee Division of |
| Radiation Health (Eddy Nanney). |
| |
| Based upon the information discussed during this conference call (reference |
| the 1333 04/26/99 update above), the NRC exited the Monitoring Phase of |
| Normal Mode at 1615 on 04/26/99. |
| |
| The NRC operations officer notified the IRO (Giitter, Miller, and Congel); |
| RCT (Bailey); NMSS EO (Cool); NMSS (Brach); Region 1 (Kinneman); Region 2 |
| (Hosey); R1DO (Anderson); R2DO (Wert); R4DO (Graves); OPA (Beecher); OIP |
| (Lieberman); OSP (Bolling and Lohaus); and EDO (Raddatz). The RCT notified |
| the Federal Emergency Management Agency (Dan Rishe), Department of Energy |
| (Thomas Yates), Environmental Protection Agency (Ms. Reddy), Department of |
| Agriculture (Bob Conley), Department of Health and Human Services (James |
| Raab), and Department of Transportation (Rick Boyle). |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 35630 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: CLINTON REGION: 3 |NOTIFICATION DATE: 04/24/1999|
| UNIT: [1] [] [] STATE: IL |NOTIFICATION TIME: 15:28[EDT]|
| RXTYPE: [1] GE-6 |EVENT DATE: 04/24/1999|
+------------------------------------------------+EVENT TIME: 14:30[CDT]|
| NRC NOTIFIED BY: JIM SCHOTTEL |LAST UPDATE DATE: 04/26/1999|
| HQ OPS OFFICER: FANGIE JONES +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |MELVYN LEACH R3 |
|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 N 0 Cold Shutdown |0 Cold Shutdown |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| SAFETY PARAMETER DISPLAY SYSTEM (SPDS) OUT OF SERVICE DUE TO MAINTENANCE. |
| |
| Planned maintenance on uninterruptible power supply (UPS) bus (1B) for the |
| process computer will disable some points on the SPDS for 48 hours. |
| Operators are taking compensatory measures for monitoring parameters. |
| |
| The licensee notified the NRC resident inspector. |
| |
| ******************** UPDATE AT 1910 ON 04/26/99 FROM RICH CHEAR TO TROCINE |
| ******************** |
| |
| The following text is a portion of a facsimile received from the licensee: |
| |
| "On 04/24/99, Clinton Power Station reported that plant [SPDS] was not |
| available during the planned UPS 1B bus outage. During this time, the |
| control room operators monitored other information sources for the |
| information unavailable on SPDS." |
| |
| "On 04/26/99, the UPS 1B bus [was] returned to service, and the SPDS [was] |
| restored at 1720 [CDT]. The SPDS is now available and operational." |
| |
| The licensee notified the NRC resident inspector. The NRC operations |
| officer notified the R3DO (Madera). |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 35632 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: SUSQUEHANNA REGION: 1 |NOTIFICATION DATE: 04/26/1999|
| UNIT: [] [2] [] STATE: PA |NOTIFICATION TIME: 01:41[EDT]|
| RXTYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 04/26/1999|
+------------------------------------------------+EVENT TIME: 00:01[EDT]|
| NRC NOTIFIED BY: FERNSLER |LAST UPDATE DATE: 04/26/1999|
| HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |MOHAMED SHANBAKY R1 |
|10 CFR SECTION: | |
|NINF INFORMATION ONLY | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
| | |
|2 M/R Y 2 Startup |0 Hot Standby |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| UNIT 2 WAS MANUALLY SCRAMMED FROM 2% POWER TO PERMIT ENTRY INTO THE DRYWELL |
| FOR REPAIR WORK. |
| |
| THE UNIT WAS MANUALLY SHUTDOWN TO PERMIT ENTRY INTO CONTAINMENT TO ALLOW |
| PERFORMANCE OF REPAIRS TO THE TRAVERSING INCORE PROBE (TIP) CHANNEL TUBING. |
| PRIOR TO SHUTDOWN, THE UNIT WAS IN THE PROCESS OF RESTARTING FOLLOWING THE |
| NINTH REFUELING OUTAGE. DURING POST-MAINTENANCE TESTING, A RESTRICTION WAS |
| DISCOVERED IN THE TUBING OF THE "C" TIP MECHANISM. THIS PREVENTED INSERTION |
| OF ITS DETECTOR AND CALIBRATION OF ITS ASSOCIATED LOCAL POWER RANGE MONITOR |
| (LPRM). IN ORDER TO PERFORM REPAIRS, THE REACTOR HAD TO BE SHUT DOWN FOR |
| DRYWELL ENTRY. FOLLOWING THE SHUTDOWN, REACTOR WATER LEVEL REMAINED |
| ESSENTIALLY UNCHANGED AT 35.7" AS RECORDED ON THE NARROW RANGE |
| INSTRUMENTATION. ALL RODS FULLY INSERTED, NO ECCS INITIATIONS OR DIESEL |
| STARTS OCCURRED, AND NO SAFETY RELIEF VALVES LIFTED. THIS EVENT IS NOT |
| REPORTABLE AS AN RPS ACTUATION SINCE IT IS PROCEDURALLY RECOGNIZED AS |
| PRE-PLANNED. THE HEAT SINK IS THE SHUTDOWN COOLING TO THE SUPPRESSION POOL. |
| THE LICENSEE PLANS TO CONTINUE COOLING THE UNIT DOWN TO MODE 4. |
| |
| THE NRC RESIDENT INSPECTOR WAS NOTIFIED BY THE LICENSEE. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|General Information or Other |Event Number: 35633 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| REP ORG: SUNOCO INC. |NOTIFICATION DATE: 04/26/1999|
|LICENSEE: SUNOCO INC. |NOTIFICATION TIME: 08:48[EDT]|
| CITY: TULSA REGION: 4 |EVENT DATE: 04/25/1999|
| COUNTY: STATE: OK |EVENT TIME: 18:36[CDT]|
|LICENSE#: 35-01755-02 AGREEMENT: N |LAST UPDATE DATE: 04/26/1999|
| DOCKET: |+----------------------------+
| |PERSON ORGANIZATION |
| |DAVID GRAVES R4 |
| |FREDERICK COMBS NMSS |
+------------------------------------------------+JOSEPH GIITTER IRO |
| NRC NOTIFIED BY: MEFFORD | |
| HQ OPS OFFICER: CHAUNCEY GOULD | |
+------------------------------------------------+ |
|EMERGENCY CLASS: N/A | |
|10 CFR SECTION: | |
|NINF INFORMATION ONLY | |
| | |
| | |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| THE SUNOCO FACILITY REPORTED AN EXPLOSION WHICH OCCURRED IN THEIR COKER |
| UNIT. |
| |
| IN THE AREA WHERE THE EXPLOSION OCCURRED, THERE ARE FOUR 1,500 mCi CS-137 |
| SOURCES; TWO EACH MOUNTED ON THE NORTH SIDE OF THE TWO 16-FOOT DRUMS. THE |
| EXPLOSION OCCURRED APPROXIMATELY 50 FEET FROM THE SOUTH SIDE OF THE DRUMS. |
| THE SOURCES WERE SHIELDED BY THE COKE DRUMS, AND IT WAS VERIFIED THAT THEY |
| ARE STILL PHYSICALLY ATTACHED TO THE UNDAMAGED DRUMS AND DO NOT APPEAR TO BE |
| DAMAGED THEMSELVES. THE LICENSEE PLANS TO CONDUCT WIPE TESTS TODAY AND LOCK |
| THE SHUTTERS. THE CAUSE OF THE EXPLOSION IS UNKNOWN AND BEING INVESTIGATED. |
| THE DAMAGE, WHICH CAN BE OBSERVED SOUTH OF THE DRUMS, CONSISTS OF ONLY |
| INSULATION DAMAGE. |
| |
| (CALL THE NRC OPERATIONS OFFICER FOR CONTACT TELEPHONE NUMBERS.) |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 35634 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: SURRY REGION: 2 |NOTIFICATION DATE: 04/26/1999|
| UNIT: [] [2] [] STATE: VA |NOTIFICATION TIME: 11:13[EDT]|
| RXTYPE: [1] W-3-LP,[2] W-3-LP |EVENT DATE: 04/26/1999|
+------------------------------------------------+EVENT TIME: 08:37[EDT]|
| NRC NOTIFIED BY: HILBERT-SEMMES |LAST UPDATE DATE: 04/26/1999|
| HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |LEN WERT R2 |
|10 CFR SECTION: | |
|AESF 50.72(b)(2)(ii) ESF ACTUATION | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
| | |
|2 N N 0 Refueling |0 Refueling |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| THE PLANT RECEIVED A TRAIN "B" HIGH CONSEQUENCE-LIMITING SAFEGUARDS (CLS) |
| SIGNAL. |
| |
| THIS OCCURRED WHEN AN ELECTRICIAN LIFTED A LEAD WHILE REPLACING RELAY |
| "2-CLS-RLY-1B1" IN THE "B" TRAIN HIGH CLS SYSTEM. ONE CONTAINMENT TRIP |
| VALVE FOR THE CONTAINMENT PARTICULATE AND GAS RADIATION MONITORS |
| REPOSITIONED (CLOSED), AND THE PARTICULATE AND GAS RADIATION MONITOR PUMP |
| DE-ENERGIZED. A SAFETY INJECTION SIGNAL WAS NOT RECEIVED AS IT WAS |
| PROPERLY DEFEATED IN ACCORDANCE WITH STATION PROCEDURES. THE ELECTRICIANS |
| VERIFIED THAT THE HIGH CLS SYSTEM WAS DE-ENERGIZED AS THEY WOULD EXPECT |
| PRIOR TO PERFORMING WORK TO PREVENT A SPURIOUS ACTUATION. THE LICENSEE IS |
| INVESTIGATING THE CAUSE AND THE REQUIRED CORRECTIVE ACTIONS. THE HIGH CLS |
| SIGNAL WAS RESET SINCE THE 2/4 CONTAINMENT PRESSURE < 14.2 PSIA MATRIX WAS |
| MET DUE TO THE ACCURACY OF THE GAUGES. THE TRIP VALVE WAS PLACED IN THE |
| PRE-EVENT CONDITION (OPEN), AND THE RADIATION MONITOR PUMP WAS RE-ENERGIZED |
| AND RESTARTED. CORE OFF LOAD WAS NOT IN PROGRESS AT THE TIME OF THIS |
| EVENT. |
| |
| THE NRC RESIDENT INSPECTOR WAS NOTIFIED BY THE LICENSEE. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 35635 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: CALVERT CLIFFS REGION: 1 |NOTIFICATION DATE: 04/26/1999|
| UNIT: [1] [2] [] STATE: MD |NOTIFICATION TIME: 16:08[EDT]|
| RXTYPE: [1] CE,[2] CE |EVENT DATE: 03/28/1999|
+------------------------------------------------+EVENT TIME: [EDT]|
| NRC NOTIFIED BY: L. SMIALEK/D. BAUDER |LAST UPDATE DATE: 04/26/1999|
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |CLIFFORD ANDERSON R1 |
|10 CFR SECTION: |FREDERICK COMBS NMSS |
|BAB2 20.2201(a)(1)(ii) LOST/STOLEN LNM>10X | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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 N 0 Refueling |0 Refueling |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| LOSS OF FOUR CESIUM-137 SOURCES (288 MICROCURIES TOTAL) (30-day report) |
| |
| Four Cs-137 sources were discovered to be missing during the performance of |
| a quarterly inventory of licensed material on 03/28/99. The sources were |
| located in a source lockup area that was under the control of radiation |
| safety, and they were present during the previous quarterly inventory. |
| There was a long-term (several-year) cleanup project ongoing at the time, |
| and numerous sources were scheduled for disposition into waste burial. The |
| licensee identified 76 sources in the newest bag but could not account for 4 |
| sources (according to the inventory). |
| |
| At this time, the licensee believes that the sources may have exited the |
| radiation controlled area as dry active waste as a result of nuclear |
| housekeeping. The current dose rate for each source was calculated to be |
| less than 0.3 mR/hour at a distance of 1' (unshielded). |
| |
| The sources were manufactured by Victoreen and were labeled as capsules. |
| Each capsule had dimensions of approximately 1/4" by 1/2" in diameter with a |
| small activity chamber at the bottom of the shaft. This was imbedded into a |
| 1/2" to 1" plastic wafer with a diameter of 3". The sources were described |
| as being too small to have a number on them; so they were labeled with magic |
| marker across the side of the plastic disc. |
| |
| The missing sources were used as keep-alive sources for the radiation |
| monitoring system (RMS). In that configuration, sources were designed to |
| develop a signal of 20 mR/hour for radiation monitors so that it is known |
| that the RMS is constantly working. The sources in question were installed |
| in the Unit 1 main steam RMS in 1985. (At that time, the sources were |
| reported to be 100 mCi each, and it was reported that each of the missing |
| sources has since decayed to 72 mCi.) The main steam RMS was replaced in |
| 1997. Two of the missing sources were removed on 03/21/97, and two were |
| removed on 04/25/97. The sources were then labeled for disposition. |
| |
| Considered individually, the activity of each source is less than the |
| reportable limits specified in 10 CFR Part 20, Appendix C. However, |
| considered in the aggregate, the activity for the total loss of material |
| (288 mCi) exceeds the reportable quantity of 100 mCi for Cesium-137, which |
| is 10 times the value listed in Appendix C (10 mCi) per source. The missing |
| sources were reportedly located in one bag, so the licensee is considering |
| the missing sources as a single entity. |
| |
| After identification of the missing sources on 03/28/99, the licensee |
| notified the NRC resident inspector and NRC Region 1 (Ronald Nimitz). The |
| licensee also notified the NRC resident inspector of this event notification |
| to the NRC Operations Center. In addition, the licensee plans to submit a |
| licensee event report within 30 days. |
| |
| (Call the NRC operations officer for licensee contact telephone numbers.) |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 35636 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: LIMERICK REGION: 1 |NOTIFICATION DATE: 04/26/1999|
| UNIT: [1] [] [] STATE: PA |NOTIFICATION TIME: 23:47[EDT]|
| RXTYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 04/26/1999|
+------------------------------------------------+EVENT TIME: 23:15[EDT]|
| NRC NOTIFIED BY: GREG SOSSON |LAST UPDATE DATE: 04/26/1999|
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |CLIFFORD ANDERSON R1 |
|10 CFR SECTION: | |
|AOUT 50.72(b)(1)(ii)(B) OUTSIDE DESIGN BASIS | |
|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
+------------------------------------------------------------------------------+
| DISCOVERY OF TWO LOCAL POWER RANGE MONITORS INDICATING INCONSISTENTLY WITH |
| THE REMAINING LOCAL POWER RANGE MONITORS |
| |
| The following text is a portion of a facsimile received from the licensee: |
| |
| "Upon review of local power range monitor (LPRM) data for Unit 1, [two] |
| LPRMs were determined be indicating inconsistently with the remaining LPRMs. |
| The cause is believed to be reversed cable inputs to the LPRM drawer. The |
| problem is believed to be under-vessel. |
| |
| "As a result of this condition, the 'B' and 'D' [average power range |
| monitors (APRMs)] and both rod block monitor [(RBM)] channels were declared |
| inoperable at 2315 [on 04/26/99]. This condition has existed since the |
| previous refueling outage [which was exited] in June [of] 1998. |
| |
| "The suspect LPRMs are being bypassed which will restore the APRMs and RBMs |
| to an OPERABLE status. |
| |
| "Generic investigations are in progress; however, initial review of |
| operating data indicates normal operation of [the] remaining LPRMs. This |
| investigation will analyze any impact on thermal limits and fuel |
| performance." |
| |
| The licensee stated that the RBMs are not required for operability at this |
| time. However, the unit is currently in a 12-hour limiting condition for |
| operation (LCO) which requires insertion of a half scram for the two |
| inoperable APRMs. This LCO will be exited when the LPRMs are bypassed. The |
| licensee does not anticipate any problems meeting this LCO action statement. |
| The licensee also stated that with the exceptions noted above, all systems |
| functioned as designed and there was nothing unusual or misunderstood. |
| |
| The licensee plans to notify the NRC resident inspector. |
+------------------------------------------------------------------------------+
Page Last Reviewed/Updated Thursday, March 25, 2021
Page Last Reviewed/Updated Thursday, March 25, 2021