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Event Notification Report for March 19, 2001

                    U.S. Nuclear Regulatory Commission
                              Operations Center

                              Event Reports For
                           03/16/2001 - 03/19/2001

                              ** EVENT NUMBERS **

37844  37845  37846  37847  

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|Fuel Cycle Facility                              |Event Number:   37844       |
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| FACILITY: PORTSMOUTH GASEOUS DIFFUSION PLANT   |NOTIFICATION DATE: 03/17/2001|
|   RXTYPE: URANIUM ENRICHMENT FACILITY          |NOTIFICATION TIME: 10:55[EST]|
| COMMENTS: 2 DEMOCRACY CENTER                   |EVENT DATE:        03/16/2001|
|           6903 ROCKLEDGE DRIVE                 |EVENT TIME:        11:00[EST]|
|           BETHESDA, MD 20817    (301)564-3200  |LAST UPDATE DATE:  03/17/2001|
|    CITY:  PIKETON                  REGION:  3  +-----------------------------+
|  COUNTY:  PIKE                      STATE:  OH |PERSON          ORGANIZATION |
|LICENSE#:  GDP-2                 AGREEMENT:  N  |GEOFFREY WRIGHT      R3      |
|  DOCKET:  0707002                              |JOHN HICKEY          NMSS    |
+------------------------------------------------+                             |
| NRC NOTIFIED BY:  SPAETH                       |                             |
|  HQ OPS OFFICER:  CHAUNCEY GOULD               |                             |
+------------------------------------------------+                             |
|EMERGENCY CLASS:          N/A                   |                             |
|10 CFR SECTION:                                 |                             |
|NBNL                     RESPONSE-BULLETIN      |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
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                                   EVENT TEXT                                   
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| 24 HOUR 91-01 BULLETIN - GEOMETRY VIOLATION                                  |
|                                                                              |
| At 1100 on 3/16/01, a seal test buggy was found without signs or tags as     |
| required by NCSA-PLANT_031 (Potable Sampling/Test Buggies and Carts).  Upon  |
| investigation of the test buggy, the chemical trap was found to have a       |
| nominal diameter of four inches and a length of twenty two inches.  The four |
| inch diameter violates the passive design control 2(b) which requires a      |
| three inch nominal diameter and a thirty three inch length.  Nuclear         |
| Criticality personnel have determined the maximum loading of the effected    |
| trap to be 76 gram U-235 at 3% assay.  76 grams is lower than the 350 gram   |
| safe mass limit.  The NCSE contingency analysis considers credible, a        |
| maximum five inch nominal diameter to remain subcritical.                    |
|                                                                              |
| SAFETY SIGNIFICANCE OF EVENTS:                                               |
|                                                                              |
| Safety significance is considered very low. The NCSA requirement is three,   |
| three inch nominal diameter chemical traps.  However, the NCSE allows for    |
| three, five inch nominal diameter chemical traps and remain subcritical,     |
|                                                                              |
| POTENTIAL CRITICALITY PATHWAYS INVOLVED (BRIEF SCENARIO[S] OF HOW            |
| CRITICALITY COULD OCCUR):                                                    |
|                                                                              |
| Based on the bounding calculations for five inch diameter chemical traps,    |
| there no critical pathways involved                                          |
|                                                                              |
| CONTROLLED PARAMETERS (MASS, MODERATION, GEOMETRY, CONCENTRATION, ETC.):     |
|                                                                              |
| Geometry is the controlled parameter that was violated                       |
|                                                                              |
| ESTIMATED AMOUNT, ENRICHMENT, FORM OF LICENSED MATERIAL (INCLUDE PROCESS     |
| LIMIT AND % WORST CASE OF CRITICAL MASS):                                    |
|                                                                              |
| The amount of uranium is unknown, however, it is not expected to be above    |
| 350 grams U-235 due to the operation performed with this buggy and the fact  |
| that the maximum loading of a 4" X 22" chemical trap is only 76 grams U-235  |
| at 3% assay.                                                                 |
|                                                                              |
| NUCLEAR CRITICALITY SAFETY CONTROL(S) OR CONTROL SYSTEM(S) AND DESCRIPTION   |
| OF THE FAILURES OR DEFICIENCIES                                              |
|                                                                              |
| The control violated was the geometry control of the chemical trap.  The     |
| chemical trap was required to be three inch schedule 40 pipe, but it was     |
| found to be a nominal four inch diameter pipe.                               |
|                                                                              |
| CORRECTIVE ACTIONS TO RESTORE SAFETY SYSTEM AND WHEN EACH WAS IMPLEMENTED;   |
|                                                                              |
| The test buggy was posted with temporary signs as required by                |
| NCSA-PLANT_031.  The buggy will remain in the anomalous condition boundary   |
| until NDA results are obtained.  Disposition of the buggy will be determined |
| based on the NDA results.                                                    |
|                                                                              |
| The NRC Resident Inspector was notified.  The DOE Representative will be     |
| informed.                                                                    |
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|Power Reactor                                    |Event Number:   37845       |
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| FACILITY: BEAVER VALLEY            REGION:  1  |NOTIFICATION DATE: 03/18/2001|
|    UNIT:  [] [2] []                 STATE:  PA |NOTIFICATION TIME: 00:03[EST]|
|   RXTYPE: [1] W-3-LP,[2] W-3-LP                |EVENT DATE:        03/17/2001|
+------------------------------------------------+EVENT TIME:        21:13[EST]|
| NRC NOTIFIED BY:  TURNER                       |LAST UPDATE DATE:  03/18/2001|
|  HQ OPS OFFICER:  CHAUNCEY GOULD               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |PETE ESELGROTH       R1      |
|10 CFR SECTION:                                 |                             |
|*RPS 50.72(b)(2)(iv)(B)  RPS ACTUATION - CRITICA|                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|                                                   |                          |
|2     A/R        Y       100      Power Operation  |0        Hot Standby      |
|                                                   |                          |
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                                   EVENT TEXT                                   
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| REACTOR TRIP FROM 100% POWER DUE TO DECREASING STEAM GENERATOR WATER LEVELS  |
|                                                                              |
| During 100% power operation of Unit 2, the Reactor Protection System (RPS)   |
| properly initiated an automatic Reactor Scram signal in response to          |
| decreasing Steam Generator (S/G) water levels.  Steam Generator              |
| water levels were decreasing due to an 'A' Main Feedwater Pump trip, which   |
| in turn had been caused by an 'A'                                            |
| Condensate Pump trip.   All rods fully inserted into the core, and all       |
| Safety Systems operated as designed.   The                                   |
| cause of the Condensate Pump trip is not currently known, and investigation  |
| is continuing.  No Radiological Releases, RCS leaks, or S/G leaks occurred   |
| during this event.                                                           |
|                                                                              |
| The NRC Resident Inspector was notified.                                     |
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|Power Reactor                                    |Event Number:   37846       |
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| FACILITY: CALLAWAY                 REGION:  4  |NOTIFICATION DATE: 03/18/2001|
|    UNIT:  [1] [] []                 STATE:  MO |NOTIFICATION TIME: 04:12[EST]|
|   RXTYPE: [1] W-4-LP                           |EVENT DATE:        03/18/2001|
+------------------------------------------------+EVENT TIME:        02:12[CST]|
| NRC NOTIFIED BY:  BARTON                       |LAST UPDATE DATE:  03/18/2001|
|  HQ OPS OFFICER:  CHAUNCEY GOULD               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |WILLIAM JOHNSON      R4      |
|10 CFR SECTION:                                 |                             |
|*COM 50.72(b)(3)(xiii)   LOSS COMM/ASMT/RESPONSE|                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          Y       100      Power Operation  |100      Power Operation  |
|                                                   |                          |
|                                                   |                          |
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                                   EVENT TEXT                                   
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| THE EOF IS CONSIDERED UNAVAILABLE DUE TO PARTIAL LOSS OF POWER.              |
|                                                                              |
| A partial loss of electrical power to the Emergency Operations Facility      |
| (EOF) occurred at 0212 CST.  The partial loss of power resulted from opening |
| a circuit breaker that appeared to be tripped.  The failed circuit feeds     |
| lighting in the EOF as well as various other support loads.  Based on the    |
| partial loss of electrical power, the EOF is being considered unavailable.   |
| Callout of electrical support is in progress for troubleshooting and         |
| repair.                                                                      |
|                                                                              |
| The NRC Resident Inspector will be informed.                                 |
|                                                                              |
| ***** UPDATE AT 1216 EST ON 03/18/01 FROM SCOTT MAGLIO TO LEIGH TROCINE      |
| *****                                                                        |
|                                                                              |
| The following text is a portion of a facsimile received from the licensee:   |
|                                                                              |
| "This is a followup notification to the initial call made at 0312 [CST] on   |
| 03/18/01.  Restored electrical power to the Emergency Operations Facility at |
| 1010 [CST].  The partial loss of power to the facility was caused by a fault |
| on one of the parking lot lighting circuits.  This circuit has been          |
| isolated.  Facility and equipment checks have been initiated."               |
|                                                                              |
| The licensee plans to notify the NRC resident inspector.  The NRC operations |
| officer notified the R4DO (Johnson).                                         |
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+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   37847       |
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| FACILITY: DIABLO CANYON            REGION:  4  |NOTIFICATION DATE: 03/18/2001|
|    UNIT:  [1] [2] []                STATE:  CA |NOTIFICATION TIME: 05:07[EST]|
|   RXTYPE: [1] W-4-LP,[2] W-4-LP                |EVENT DATE:        03/18/2001|
+------------------------------------------------+EVENT TIME:        01:00[PST]|
| NRC NOTIFIED BY:  BROWN                        |LAST UPDATE DATE:  03/18/2001|
|  HQ OPS OFFICER:  CHAUNCEY GOULD               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |WILLIAM JOHNSON      R4      |
|10 CFR SECTION:                                 |                             |
|DDDD 73.71               UNSPECIFIED PARAGRAPH  |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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  |
|                                                   |                          |
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                                   EVENT TEXT                                   
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| Unaccounted for security weapon.  Compensatory measures were put into place  |
| immediately following discovery.  Contact HOO for additional information.    |
|                                                                              |
| The NRC Resident Inspector was notified.                                     |
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