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| |
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| | |
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+-----+----------+-------+--------+-----------------+--------+-----------------+
|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| |
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+-----+----------+-------+--------+-----------------+--------+-----------------+
|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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| | |
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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 | |
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| | |
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+-----+----------+-------+--------+-----------------+--------+-----------------+
|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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Page Last Reviewed/Updated Thursday, March 25, 2021
Page Last Reviewed/Updated Thursday, March 25, 2021