Event Notification Report for May 28, 2002
U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
05/24/2002 - 05/28/2002
** EVENT NUMBERS **
38634 38809 38935 38941 38942 38943 38945 38946
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 38634 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: SAINT LUCIE REGION: 2 |NOTIFICATION DATE: 01/17/2002|
| UNIT: [1] [2] [] STATE: FL |NOTIFICATION TIME: 13:07[EST]|
| RXTYPE: [1] CE,[2] CE |EVENT DATE: 01/17/2002|
+------------------------------------------------+EVENT TIME: 11:45[EST]|
| NRC NOTIFIED BY: KELLY KORTH |LAST UPDATE DATE: 05/27/2002|
| HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: NON EMERGENCY |ROBERT HAAG R2 |
|10 CFR SECTION: | |
|APRE 50.72(b)(2)(xi) OFFSITE NOTIFICATION | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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
+------------------------------------------------------------------------------+
| OFFSITE NOTIFICATION INVOLVING RECOVERED SEA TURTLE FROM INTAKE CANAL
|
| |
| At approximately 1130 EST on 01/17/02, a green sea turtle was retrieved from |
| the intake canal and a determination was made that it was in need of |
| rehabilitation. As required by the Plant's Sea Turtle Permit, the Florida |
| Fish and Wildlife Conservation Commission (FFWCC) was notified at 1145 EST. |
| |
| The licensee notified the NRC Resident Inspector. |
| |
| See EN #38513 for 2001 occurrences. |
| |
| * * * UPDATE ON 1/28/02 @ 1243 BY KORTH TO GOULD * * * |
| |
| At approximately 1115 on 1/28/02 a loggerhead turtle was retrieved from the |
| plant's intake canal. The turtle was determined to be in need of |
| rehabilitation. Per the licensee's turtle permit, the Florida Fish and |
| Wildlife Conservation Commission (FWCC) was notified at 1125. |
| |
| The NRC Resident Inspector was notified. Notified Reg 2 RDO (Ninh) |
| |
| * * * UPDATE ON 2/6/02 @ 0853 BY MERRILL TO GOULD * * * |
| |
| At approximately 0745 on 2/6/02 an injured green sea turtle was rescued from |
| the plant's intake canal. The turtle was alive, but in need of |
| rehabilitation. The turtle will be transported to a facility in Clearwater |
| for treatment. The Florida Department of Environmental Protection has been |
| notified of the event. |
| |
| The NRC Resident Inspector was notified. |
| |
| Notified Reg 2 RDO(Fredrickson) |
| |
| * * * UPDATE 1025 3/2/2002 BY R. DIEHL TAKEN BY R. STRANSKY * * * |
| |
| "At approximately 0830 3/2/02 a Loggerhead turtle was retrieved from the |
| plant's intake canal. The turtle was determined to be in need of |
| rehabilitation. Per the plant's turtle permit, the Florida Fish and Wildlife |
| Conservation Commission (FWCC) was notified at 0845." |
| |
| The NRC resident inspector has been informed of this report. HOO notified |
| R2DO (Julian). |
| |
| * * * UPDATE 1040EST ON 3/5/02 FROM GEORGE TULLIDGE TO S. SANDIN * * * |
| |
| "At Approximately 1000 on 3/5/02, a Loggerhead turtle was retrieved from the |
| plant intake canal. The turtle was determined to be in need of |
| rehabilitation. Per the plant's turtle permit, the Florida Fish and |
| Wildlife Conservation Commission (FWCC) was notified." |
| |
| The NRC resident inspector has been informed of this report. HOO notified |
| R2DO (Julian). |
| |
| * * * UPDATE 1047EST ON 3/6/02 FROM D. EMLING TO M.NORRIS * * * |
| |
| "At Approximately 1000 on 3/6/02, a Loggerhead turtle was retrieved from the |
| plant intake canal. The turtle was determined to be in need of |
| rehabilitation. Per the plant's turtle permit, the Florida Fish and |
| Wildlife Conservation Commission (FWCC) was notified." |
| |
| The NRC resident inspector has been informed of this report. HOO notified |
| R2DO (Henson). |
| |
| * * * UPDATE ON 3/10/02 @ 1740 BY KORTH TO GOULD * * * |
| |
| The Florida Department of Environmental protection was notified of a |
| loggerhead sea turtle requiring off-site rehabilitation. The turtle was |
| recovered live from the plant's intake canal. |
| |
| The NRC Resident Inspector was notified. |
| |
| Notified Reg @ RDO (Henson) |
| |
| * * * UPDATE ON 5/27/02 AT 1012 BY RUSSELL SCOT TO FANGIE JONES * * * |
| |
| The Florida Department of Environmental protection was notified of a sick |
| underweight loggerhead sea turtle requiring off-site rehabilitation. The |
| turtle was recovered live from the plant's intake canal at 0915 EST on |
| 5/27/02. |
| |
| The NRC Resident Inspector will be notified. |
| |
| Notified R2DO (Thomas Decker). |
| |
| * * * UPDATE AT 1938EDT ON 5/27/02 FROM ELLIOT SUMNER TO S. SANDIN * * * |
| |
| "A dead Sea Turtle was recovered from the St. Lucie Plant Intake Canal at |
| approx. 1600 [on] 05/27/02. The FL. Dept. of Envir. Protection was notified |
| (1615 [on] 05/27/02) as required by the St. Lucie Plant - Sea Turtle Permit. |
| This notification to a state government agency requires a four (4) hr |
| non-emergency notification to the NRC per 10 CFR 50.72(b)(2)(xi). There |
| were no unusual evolutions in progress beyond normal operations which would |
| have contributed to this event." |
| |
| The NRC Resident Inspector will be informed. |
| |
| Notified R2DO(Decker). |
+------------------------------------------------------------------------------+
!!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!!
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 38809 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: DRESDEN REGION: 3 |NOTIFICATION DATE: 03/28/2002|
| UNIT: [] [2] [3] STATE: IL |NOTIFICATION TIME: 01:24[EST]|
| RXTYPE: [1] GE-1,[2] GE-3,[3] GE-3 |EVENT DATE: 03/27/2002|
+------------------------------------------------+EVENT TIME: 22:30[CST]|
| NRC NOTIFIED BY: BROCK |LAST UPDATE DATE: 05/24/2002|
| HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: NON EMERGENCY |BRUCE BURGESS R3 |
|10 CFR SECTION: | |
|AUNA 50.72(b)(3)(ii)(B) UNANALYZED CONDITION | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE
|
+-----+----------+-------+--------+-----------------+--------+-----------------+
| | |
|2 N Y 95 Power Operation |95 Power Operation |
|3 N Y 100 Power Operation |100 Power Operation |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| SPURIOUS OPERATION OF THE REACTOR HEAD VENT VALVES IN THE SAFE
SHUTDOWN |
| REPORT(SSR) IS NOT CONSISTENT WITH THE NRC SAFETY EVALUATION REPORT.
|
| |
| Specifically the Section 3.4.3 of the SER states that spurious operation of |
| the Reactor Head Vent (RHV) valves {SO-2(3)-0220-46 ann SO-2(3)-0220-47} |
| which would result in Reactor Coolant inventory loss, will be prevented by a |
| pre-fire action to ensure closure by removing power from these valves. |
| However, the current SSR dispositions this postulated concern based upon the |
| assumption that spurious operation of greater than one normally closed valve |
| in a series combination is not considered a credible failure mode except for |
| high/low pressure systems. As a result, there is no pre-fire action to |
| ensure closure by removing power to RHV valves. The documentation (FPR |
| revision and 50.59) that supports the change in the licensing position of |
| these valves from that described in the SER to the current SSR has not been |
| located. |
| |
| A review was performed on the Fire Protection Report (FPR) which includes |
| the Fire Hazard Analysis & Safe Shutdown Analysis, to evaluate the options |
| for additional sources of water to address the loss of reactor inventory |
| from the spurious actions of the reactor head vent valves. This review |
| indicated that no specific circuit analysis was performed to determine what |
| other available sources of water could be used for makeup of reactor |
| inventory via the reactor head vent valves spurious operation. Therefore, |
| in the event of a fire in the various assumed Appendix R fire zones, a |
| qualified makeup source would not be available to mitigate the inventory |
| loss introduced by the spurious operation of both RHV valves. |
| |
| Fuses have been pulled to remove power to and close a RHV valve on both Unit |
| 2 and Unit 3 to comply with the SER. The action puts the plant in the |
| configuration required if the RHV valves are considered a high-low pressure |
| boundary. Completion of this action restores the plants compliance with the |
| referenced SER. |
| |
| Dresden Engineering will perform an evaluation that documents the RHV valves |
| as a high-low pressure boundary and that the actions taken above are |
| adequate to mitigate the multiple spurious failures which must be postulated |
| when these valves are considered a high/low pressure boundary. A revision |
| to the FPR will be made to document the results of this evaluation. |
| |
| The NRC Resident Inspector will be notified. |
| |
| ***** RETRACTION AT 1815 EDT ON 05/24/02 FROM WARREN DEAGLE TO LEIGH
TROCINE |
| ***** |
| |
| The following text is a portion of a facsimile received from the licensee: |
| |
| "On March 27, 2002 at 2230 CST, Dresden Station made an ENS Notification (EN |
| 38809) regarding fuses that had not been removed from reactor head vent |
| (RHV) valves. It was reported that the station's methodology for addressing |
| fire induced spurious operation of the RHV valves in the safe shutdown |
| report was not consistent with the NRC safety evaluation report. During |
| preliminary reviews, it was postulated that a fire could result in spurious |
| operation of these valves that in turn would result in reactor inventory |
| loss. The postulated water source in the scenario was the opposite unit's |
| Control Rod Drive system, which may not provide the makeup capability to |
| maintain reactor water level above the top of active fuel (TAF)." |
| |
| "The condition was reported in accordance with 10 CFR 50.72(b)(3)(ii)(B), as |
| an Unanalyzed condition that significantly degraded plant safety." |
| |
| "Upon further evaluation, it has been determined that a credible fire that |
| would cause spurious operation of the RHV valves would not result in a loss |
| in the High Pressure Coolant Injection (HPCI) system. Therefore, the HPCI |
| system would have been available and capable to provide inventory makeup to |
| the reactor vessel. Vessel water level would have been maintained above |
| TAF. Based on the subsequent evaluation, the safety function (inventory |
| control) would have been maintained at all times during post-fire safe |
| shutdown of the unit." |
| |
| "Therefore, based on the above conclusion, this notification is being |
| retracted." |
| |
| The licensee notified the NRC resident inspector. The NRC operations |
| officer notified the R3DO (Christine Lipa). |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|General Information or Other |Event Number: 38935 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| REP ORG: TEXAS DEPARTMENT OF HEALTH |NOTIFICATION DATE: 05/22/2002|
|LICENSEE: HVJ ASSOCIATES |NOTIFICATION TIME: 17:49[EDT]|
| CITY: AUSTIN REGION: 4 |EVENT DATE: 05/21/2002|
| COUNTY: STATE: TX |EVENT TIME: 10:00[CDT]|
|LICENSE#: L03813-003 AGREEMENT: Y |LAST UPDATE DATE: 05/22/2002|
| DOCKET: |+----------------------------+
| |PERSON ORGANIZATION |
| |LINDA SMITH R4 |
| |THOMAS ESSIG NMSS |
+------------------------------------------------+ |
| NRC NOTIFIED BY: HELEN WATKINS | |
| HQ OPS OFFICER: JOHN MacKINNON | |
+------------------------------------------------+ |
|EMERGENCY CLASS: NON EMERGENCY | |
|10 CFR SECTION: | |
|NAGR AGREEMENT STATE | |
| | |
| | |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| STOLEN HUMBOLDT GAUGE CONTAINING CESIUM-137 AND AMERICIUM-241 THAT
WAS LATER |
| RECOVERED |
| |
| |
| On May 21, 2002, a Humboldt 5001EZ gauge was stolen between the hours of |
| 1000 hours and 1200 hours from a truck parked behind the Licensee's office, |
| HVJ Associates, Inc. located in Austin. The gauge was discovered missing at |
| 1230 hours and was later found at 1400 hours. The gauge was found by |
| security at a local shopping plaza. The gauge was secure inside the yellow |
| container on the ground near a dumpster. The shielding remained intact and |
| no one was exposed to the excessive radiation levels. The local police had |
| been notified of the gauge being stolen. The serial number for the Humboldt |
| gauge is 3776. No media attention. |
| |
| Texas Incident No. I-7896 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 38941 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: GINNA REGION: 1 |NOTIFICATION DATE: 05/24/2002|
| UNIT: [1] [] [] STATE: NY |NOTIFICATION TIME: 09:26[EDT]|
| RXTYPE: [1] W-2-LP |EVENT DATE: 05/23/2002|
+------------------------------------------------+EVENT TIME: 14:00[EDT]|
| NRC NOTIFIED BY: JOE WIDAY |LAST UPDATE DATE: 05/24/2002|
| HQ OPS OFFICER: MIKE NORRIS +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: NON EMERGENCY |WILLIAM RULAND R1 |
|10 CFR SECTION: | |
|HFIT 26.73 FITNESS FOR DUTY | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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
+------------------------------------------------------------------------------+
| FITNESS FOR DUTY REPORT |
| |
| A non-licensed contract supervisor was determined to have provided a tainted |
| sample during a random drug test. The employee's access to the plant has |
| been terminated. |
| |
| Refer to the Headquarters Operations Officer for additional details. |
| |
| The NRC Resident Inspector has been notified. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 38942 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: SEABROOK REGION: 1 |NOTIFICATION DATE: 05/24/2002|
| UNIT: [1] [] [] STATE: NH |NOTIFICATION TIME: 12:33[EDT]|
| RXTYPE: [1] W-4-LP |EVENT DATE: 05/23/2002|
+------------------------------------------------+EVENT TIME: 19:34[EDT]|
| NRC NOTIFIED BY: PATRICK RYAN |LAST UPDATE DATE: 05/24/2002|
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: NON EMERGENCY |RONALD BELLAMY R1 |
|10 CFR SECTION: | |
|HFIT 26.73 FITNESS FOR DUTY | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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
+------------------------------------------------------------------------------+
| A CONTRACT SUPERVISOR TESTED POSITIVE FOR ALCOHOL DURING A RANDOM
|
| FITNESS-FOR-DUTY TEST (24-Hour Report) |
| |
| A contract supervisor failed a random drug and alcohol fitness-for-duty |
| test. The individual tested positive for alcohol, and the results of the |
| drug portion of the test have not yet been received. The individual's |
| unescorted site access was terminated at 1937 on 05/23/02, and the licensee |
| plans to perform a review of the individual's work for the last 30 calendar |
| days or for the duration of the individual's employment (which ever is |
| shorter). (Call the NRC operations officer for additional details.) |
| |
| The licensee notified the NRC resident inspector and plans to notify the NRC |
| Region 1 office (Greg Smith). |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Other Nuclear Material |Event Number: 38943 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| REP ORG: US ARMY |NOTIFICATION DATE: 05/24/2002|
|LICENSEE: US ARMY |NOTIFICATION TIME: 14:39[EDT]|
| CITY: ABERDEEN REGION: 1 |EVENT DATE: 05/24/2002|
| COUNTY: STATE: MD |EVENT TIME: 11:30[EDT]|
|LICENSE#: 19-00294-19 AGREEMENT: Y |LAST UPDATE DATE: 05/24/2002|
| DOCKET: |+----------------------------+
| |PERSON ORGANIZATION |
| |RONALD BELLAMY R1 |
| |FRED BROWN NMSS |
+------------------------------------------------+NADER MAMISH IRO |
| NRC NOTIFIED BY: JOHN BECKMAN | |
| HQ OPS OFFICER: LEIGH TROCINE | |
+------------------------------------------------+ |
|EMERGENCY CLASS: NON EMERGENCY | |
|10 CFR SECTION: | |
|BAB1 20.2201(a)(1)(i) LOST/STOLEN LNM>1000X | |
| | |
| | |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| DISCOVERY OF CONTAMINATION/TRITIUM LEAKAGE ON AN M-1 TANK MUZZLE
REFERENCE |
| SENSOR AT THE US ARMY ABERDEEN TEST SITE TANK RANGE |
| |
| While preparing a tank for shipment, the licensee discovered that an M-1 |
| Tank Muzzle Reference Sensor (MRS) containing 10 curies of tritium was |
| leaking and discharged to the atmosphere. The exact time that the leak |
| occurred is not currently known. Apparently, 200 rounds were fired from |
| this tank, and then the MRS was checked prior to shipment of the tank to |
| Michigan. Three swipe counts were performed, and the contamination levels |
| ranged between 150,000 and 170,000 dpm/100 cm�. |
| |
| The licensee stated that there were no personnel contaminations as a result |
| of this event. A swipe count was performed on the hands of the individual |
| who installed the MRS, and it was negative. Urinalysis is also being |
| performed as a precautionary measure, and the results are pending. |
| Apparently, no other personnel came into contact with the leaking MRS. |
| |
| The leaking MRS was removed, double bagged, and placed in storage. The |
| licensee plans to dispose of it as radioactive waste. |
| |
| There was minimal contamination on the tank gun tube, and it was cleaned to |
| acceptable levels (below limits). The licensee plans to ship the tank |
| without the MRS. |
| |
| (Call the NRC operations officer for a contact telephone number for the |
| licensee's Radiation Safety Officer.) |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 38945 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: CATAWBA REGION: 2 |NOTIFICATION DATE: 05/24/2002|
| UNIT: [1] [2] [] STATE: SC |NOTIFICATION TIME: 17:06[EDT]|
| RXTYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 05/24/2002|
+------------------------------------------------+EVENT TIME: 14:20[EDT]|
| NRC NOTIFIED BY: JEFFREY BRADLEY |LAST UPDATE DATE: 05/24/2002|
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: NON EMERGENCY |THOMAS DECKER R2 |
|10 CFR SECTION: | |
|APRE 50.72(b)(2)(xi) OFFSITE NOTIFICATION | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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
+------------------------------------------------------------------------------+
| OFFSITE NOTIFICATION REGARDING THE DISCOVERY OF AN OLD SPENT BLASTING
CAP IN |
| THE YARD OUTSIDE THE PROTECTED AREA |
| |
| The following text is a portion of a facsimile received from the licensee: |
| |
| "Offsite agency assistance [was] requested to assess a spent blasting cap |
| found outside the Protected Area in the yard. A City of Rock Hill |
| explosives expert was requested by security to assess/take possession of the |
| spent blasting cap." |
| |
| "The explosives expert determined that the blasting cap was spent[. The |
| explosives expert also] determined its age as 10-20 years at least and [that |
| it] was leftover from the construction of the site. The officer took |
| possession of the spent blasting cap and removed it from the site at 1507 |
| EDT." |
| |
| The licensee notified the NRC resident inspector and City of Rock Hill |
| Police Department in South Carolina. The licensee also plans to notify the |
| States of North Carolina and South Carolina as well as York, Gaston, and |
| Mecklenburg Counties. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 38946 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: CATAWBA REGION: 2 |NOTIFICATION DATE: 05/26/2002|
| UNIT: [1] [] [] STATE: SC |NOTIFICATION TIME: 15:24[EDT]|
| RXTYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 05/26/2002|
+------------------------------------------------+EVENT TIME: 08:35[EDT]|
| NRC NOTIFIED BY: BRADLEY |LAST UPDATE DATE: 05/26/2002|
| HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: NON EMERGENCY |THOMAS DECKER R2 |
|10 CFR SECTION: | |
|AIND 50.72(b)(3)(v)(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
+------------------------------------------------------------------------------+
| PERSONNEL ACCESS DOOR BETWEEN UPPER AND LOWER CONTAINMENT
COMPARTMENTS FOUND |
| OPEN |
| |
| Maintenance technicians discovered a personnel access door (submarine hatch) |
| open between the upper and lower containment compartments. The seals and |
| sealing surfaces were inspected and the door was closed immediately in |
| compliance with LCO 3.6.14. While the door was open, containment divider |
| integrity was not intact per LCO 3.6.14. This LCO establishes the minimum |
| equipment requirements to ensure that the divider barrier performs its |
| safety function of ensuring that bypass leakage, in the event of a DBA, does |
| not exceed the bypass leakage assumed in the accident analysis. The divider |
| barrier functions with the ice condenser to limit the pressure and |
| temperature that could be expected following a DBA. |
| |
| An analysis performed to support a 6 hour completion time in LCO 3.6.14 |
| condition B indicates that an open hatch(7.5 sq. ft bypass area) during a |
| DBA does not impact the design pressure or temperature of the containment. |
| The submarine hatch is 2 ft in diameter(3.19 sq. ft), thus the safety |
| significance is considered minimal at this time. |
| |
| The NRC Resident Inspector will be notified along with the states of N |
| Carolina and S Carolina. |
| |
| Also the nearby counties were notified. |
+------------------------------------------------------------------------------+
Page Last Reviewed/Updated Thursday, March 25, 2021