Event Notification Report for September 30, 1999
U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
09/29/1999 - 09/30/1999
** EVENT NUMBERS **
36198 36238 36239 36240 36241 36242 36243 36244
!!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!!
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 36198 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 09/19/1999|
| UNIT: [] [2] [] STATE: CT |NOTIFICATION TIME: 08:15[EDT]|
| RXTYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 09/19/1999|
+------------------------------------------------+EVENT TIME: 07:30[EDT]|
| NRC NOTIFIED BY: MYERS |LAST UPDATE DATE: 09/29/1999|
| HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |NIEL DELLA GRECA R1 |
|10 CFR SECTION: | |
|ARPS 50.72(b)(2)(ii) RPS ACTUATION | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
| | |
|2 A N 0 Hot Standby |0 Hot Standby |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| THE PLANT HAD AN RPS ACTUATION ON A LOW LEVEL STEAM GENERATOR SIGNAL. |
| |
| The plant had a reactor protection signal actuation due to an actual low |
| level steam generator trip signal. The reactor was already shut down with |
| all rods fully inserted, so there was no affect on the reactor from this |
| actuation. The steam generator level was restored to above the low level |
| trip setpoint. The cause of the low steam generator level appears to be due |
| to inadequate procedures, but they are still investigating. |
| |
| The NRC resident inspector along with state and local agencies were notified |
| by the licensee. |
| |
| ****************** UPDATE AT 1314 ON 09/29/99 FROM KEN TRUESDALE TO LEIGH |
| TROCINE ***************** |
| |
| The following text is a portion of a facsimile received from the licensee: |
| |
| "Background" |
| |
| "A valid low steam generator lever signal was processed through the Reactor |
| Protection System (RPS) coincident logic. This signal was not expected |
| because steam generator level was being maintained by control room personnel |
| within the band required/allowed by the applicable procedure. At the time |
| of the trip signal, the reactor was in Mode 3 with the Trip Circuit Breakers |
| (TCB) open. At the time the ESF signal was generated, a normal reactor |
| shutdown had been completed (entry into Mode 3), control rods had been |
| inserted, and steam generator level was being maintained within a specified |
| range as required by the applicable procedure." |
| |
| "Reportability" |
| |
| "For the steam generator level trip event, an ESF was not needed to mitigate |
| the consequences of an event, and an ESF did not actuate as a result of the |
| trip signal. A normal reactor shutdown had been completed (entry into Mode |
| 3), control rods had previously been inserted, and steam generator level was |
| being maintained within a specified range as required by the applicable |
| procedure. For the MP2 steam generator trip event, the consequences of an |
| event were not mitigated, and an ESF component did not actuate. Therefore, |
| since an ESF signal did not process to an ESF component (TCBs were open), an |
| actuation did not occur, and an event did not exist which required |
| mitigation; this report is being retracted." |
| |
| The licensee notified the NRC resident inspector. The NRC operations center |
| notified the R1DO (Silk). |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 36238 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: GRAND GULF REGION: 4 |NOTIFICATION DATE: 09/29/1999|
| UNIT: [1] [] [] STATE: MS |NOTIFICATION TIME: 11:26[EDT]|
| RXTYPE: [1] GE-6 |EVENT DATE: 09/29/1999|
+------------------------------------------------+EVENT TIME: 08:30[CDT]|
| NRC NOTIFIED BY: WALTER CADE |LAST UPDATE DATE: 09/29/1999|
| HQ OPS OFFICER: WILLIAM POERTNER +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |JEFF SHACKELFORD R4 |
|10 CFR SECTION: |DWIGHT CHAMBERLAIN R4 |
|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 |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| POTENTIAL SABOTAGE WITH SAFETY EQUIPMENT |
| |
| Immediate compensatory measures were taken upon discovery. |
| |
| The NRC resident inspector has been notified by the licensee. |
| |
| (Refer to the HOO Log for additional details.) |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Hospital |Event Number: 36239 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| REP ORG: WOMACK ARMY MEDICAL CENTER |NOTIFICATION DATE: 09/29/1999|
|LICENSEE: WOMACK ARMY MEDICAL CENTER |NOTIFICATION TIME: 13:46[EDT]|
| CITY: FORT BRAGG REGION: 2 |EVENT DATE: 09/28/1999|
| COUNTY: CUMBERLAND STATE: NC |EVENT TIME: 11:05[EDT]|
|LICENSE#: 32-04054-04 AGREEMENT: Y |LAST UPDATE DATE: 09/29/1999|
| DOCKET: 03002631 |+----------------------------+
| |PERSON ORGANIZATION |
| |RUDOLPH BERNHARD R2 |
| |SCOTT MOORE NMSS |
+------------------------------------------------+ |
| NRC NOTIFIED BY: CAPTAIN DAUS | |
| HQ OPS OFFICER: LEIGH TROCINE | |
+------------------------------------------------+ |
|EMERGENCY CLASS: N/A | |
|10 CFR SECTION: | |
|LADM 35.33(a) MED MISADMINISTRATION | |
| | |
| | |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| POSSIBLE MEDICAL MISADMINISTRATION AT WOMACK ARMY MEDICAL CENTER (24-hour |
| report) |
| |
| At 1000 on 09/29/99, the radiation safety officer was notified of a |
| potential medical misadministration at Womack Army Medical Center located at |
| Fort Bragg in North Carolina. The following information was provided: |
| |
| At 1100 on 09/28/99, a patient was scheduled to received 2 mCi of I-131 as |
| part of a yearly whole body scan. (The patient had a history of thyroid |
| cancer, and the patient's thyroid had previously been removed.) At 1105, a |
| technician measured a dose of 2.76 mCi of I-131. The technician then made a |
| revision to the dose on the paperwork and administered the dose prior to |
| obtaining the authorized user's approval of the change Apparently, the |
| technician assumed that the authorized user would approve the change. The |
| authorized user subsequently signed the paperwork (after the dose was |
| administered). |
| |
| This was in violation of the licensee's Quality Management Program which |
| requires the authorized user to approve (either verbally or in writing) dose |
| revisions prior to administration. The licensee stated that the authorized |
| user's verbal approval of a dose revision can be given prior to the |
| administration if the authorized user is not physically available to sign an |
| approval prior to performance of an administration involving a dose |
| revision. In that case, the paperwork can be signed by the authorized user |
| after the administration. |
| |
| The licensee stated that adverse health effects are not expected as a result |
| of this event. At the time of this event notification, it was not known |
| whether or not the patient and/or attending physician had been notified of |
| the potential medical misadministration. |
| |
| The licensee notified the NRC Region 2 office (Hector Bermudez). |
| |
| (Call the NRC operations center for licensee contact telephone numbers.) |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 36240 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: PERRY REGION: 3 |NOTIFICATION DATE: 09/29/1999|
| UNIT: [1] [] [] STATE: OH |NOTIFICATION TIME: 15:58[EDT]|
| RXTYPE: [1] GE-6 |EVENT DATE: 09/29/1999|
+------------------------------------------------+EVENT TIME: 15:45[EDT]|
| NRC NOTIFIED BY: BRIAN P. STETSON |LAST UPDATE DATE: 09/29/1999|
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |TONY VEGEL R3 |
|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 Y 100 Power Operation |100 Power Operation |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| OFFSITE NOTIFICATION OF NON-RADIOLOGICAL TREATED WATER BEING RELEASED TO THE |
| ENVIRONMENT VIA A PATHWAY NOT SPECIFIED IN THE NPDES PERMIT |
| |
| The following text is a portion of a facsimile received from the licensee: |
| |
| "Non-radiological treated water was released to the environment via a |
| pathway not specified in the NPDES permit. [The] State of Ohio |
| Environmental Protection Agency was notified." |
| |
| The licensee stated that raw water from the lake is treated with a |
| coagulator and gravity filter before being stored in a clearwell. The water |
| in the clearwell is then used as seal water for the circulating water pumps |
| and service water pumps. The clearwell overflows to the storm drains, and |
| various released of this treated water has occurred over the life of the |
| plant. The NPDES permit does not allow treated water to be released via the |
| storm drain system. |
| |
| Operators recently received training of the NPDES permit requirements |
| following a previous valve failure that resulted in a release of chlorinated |
| water to a storm drain on 08/17/99. (Refer to event #36037 for additional |
| information.) As a result of this heightened awareness, an operator |
| performing rounds questioned the clearwell overflow release path, and it was |
| discovered that pathway was not in accordance with the NPDES permit. |
| |
| The licensee notified the NRC resident inspector and the State of Ohio |
| Environmental Protection Agency. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 36241 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: SAN ONOFRE REGION: 4 |NOTIFICATION DATE: 09/29/1999|
| UNIT: [1] [2] [3] STATE: CA |NOTIFICATION TIME: 17:21[EDT]|
| RXTYPE: [1] W-3-LP,[2] CE,[3] CE |EVENT DATE: 09/29/1999|
+------------------------------------------------+EVENT TIME: 10:25[PDT]|
| NRC NOTIFIED BY: CLAY WILLIAMS |LAST UPDATE DATE: 09/29/1999|
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |JEFF SHACKELFORD R4 |
|10 CFR SECTION: |JOSEPH GIITTER IRO |
|APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION |LEDYARD (TAD) MARSH NRR |
| |WILLIAM BEECHER, HQ PAO |
| |KEN CIBOCH, HQ FEMA |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1 N N 0 Decommissioned |0 Decommissioned |
|2 N Y 100 Power Operation |100 Power Operation |
|3 N Y 100 Power Operation |100 Power Operation |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| ERRONEOUS MEDIA REPORTS OF AN ACTUAL EMERGENCY AND THE NEED FOR AN |
| EVACUATION DURING THE LICENSEE'S PERFORMANCE OF A TEST OF THE EMERGENCY |
| NOTIFICATION SYSTEM SIRENS |
| |
| The following text is a portion of a facsimile received from the licensee: |
| |
| "This notification is for San Onofre Units 1, 2, and 3 and is being made in |
| accordance with 10CFR50.72(b)(2)(vi) for an event related to the public |
| health and safety for which a news release is planned or notification to |
| other government agencies has been or will be made. Southern California |
| Edison (SCE) is providing this information to the NRC due to possible |
| questions the NRC may receive from the public." |
| |
| "On September 29, 1999, at 1019 PDT, SCE initiated a test of the offsite |
| sirens. All local residents, businesses, and schools were notified of the |
| test beforehand. At about 1025 PDT, SCE was notified that a local cable |
| [television] station had broadcast an actual emergency evacuation message to |
| local residents. That erroneous message has been corrected, and all local |
| media outlets have been notified not to pick up the incorrect report." |
| |
| "[ ... ] At the time of this occurrence, Unit 1 remained permanently |
| defueled, and Units 2 and 3 were operating at about full power." |
| |
| The licensee stated that the cause of the erroneous message is currently |
| under investigation. The licensee also stated that the site received a |
| couple of calls from members of the public and that 911 received over 100 |
| calls as well. |
| |
| The licensee notified the NRC resident inspectors, the emergency |
| preparedness staff at NRC Region 4, and the NRC NRR project manager for San |
| Onofre Units 2 and 3 (L. Raghaven). NRC Region 4 plans to notify the State |
| of California and the applicable Federal Emergency Management Agency's |
| regional office (FEMA Region 9). |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 36242 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: HOPE CREEK REGION: 1 |NOTIFICATION DATE: 09/29/1999|
| UNIT: [1] [] [] STATE: NJ |NOTIFICATION TIME: 18:58[EDT]|
| RXTYPE: [1] GE-4 |EVENT DATE: 09/29/1999|
+------------------------------------------------+EVENT TIME: 11:33[EDT]|
| NRC NOTIFIED BY: ART BREADY |LAST UPDATE DATE: 09/29/1999|
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |DAVID SILK R1 |
|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 |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| LOSS OF CONTROL ROOM INDICATION OF RADIOACTIVE EFFLUENT RELEASE VIA THE |
| SOUTH PLANT VENT RADIATION MONITORING SKID FOR GREATER THAN 8 HOURS |
| |
| The following text is a portion of a facsimile received from the licensee: |
| |
| "At 1049 [hours] on 09/29/99, the South Plant Vent (SPV) Radiation |
| Monitoring Skid (RMS) was removed from service for a scheduled radiation |
| protection surveillance. Following completion of this surveillance, the |
| skid was returned to service at 1127 [hours]. At 1133 [hours], the SPV RMS |
| skid began giving erratic indications including high effluent radiation, |
| high particulate activity, and high noble gas activity. Radiological |
| surveys of the plant vent stack and other associated areas revealed no |
| change from normal radiological conditions. Checks of corroborating |
| channels revealed no change from normal radiological conditions. |
| Compensatory measures have been initiated [in accordance with] plant |
| technical specifications. The effect of this failure is a loss of control |
| room indication of radioactive effluent release via the [SPV] Stack. The |
| loss of this assessment capability for greater than [8] hours requires a |
| [1-hour] report to the NRC [in accordance with] the Hope Creek [Emergency |
| Classification Guidance]. Maintenance technicians are currently |
| troubleshooting the problem, and the cause of erratic indications is not yet |
| known." |
| |
| The licensee plans to notify the NRC resident inspector. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 36243 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: ROBINSON REGION: 2 |NOTIFICATION DATE: 09/29/1999|
| UNIT: [2] [] [] STATE: SC |NOTIFICATION TIME: 21:10[EDT]|
| RXTYPE: [2] W-3-LP |EVENT DATE: 09/29/1999|
+------------------------------------------------+EVENT TIME: 20:39[EDT]|
| NRC NOTIFIED BY: HAROLD CHERNOFF |LAST UPDATE DATE: 09/29/1999|
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: ALE |RUDOLPH BERNHARD R2 |
|10 CFR SECTION: |LEDYARD (TAD) MARSH NRR |
|AAEC 50.72 (a) (1) (I) EMERGENCY DECLARED |JOSEPH GIITTER IRO |
|APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION |JANET QUISSELL RCT |
|NOCM COMM ASST BRIEF |HENRY BAILEY IRO |
| |FRANK CONGEL IRO |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|2 N N 0 Cold Shutdown |0 Cold Shutdown |
| | |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| ALERT DECLARED DUE TO THE SIGHTING OF A TORNADO WITHIN THE PROTECTED AREA |
| |
| At 2039 on 09/29/99, a tornado was confirmed within the protected area, and |
| it has abated. Accordingly, the licensee declared an Alert at 2049. The |
| licensee does not plan to activate its emergency facilities. There were no |
| injuries reported. Minor damage to non-power block buildings has been |
| identified. Site inspections are currently in progress. Offsite power |
| remains available, and no fission product barriers were affected. |
| |
| The unit is currently in Cold Shutdown with the reactor vessel head on. |
| Preparations for head lift were in progress at the time of the event. The |
| unit was shut down for a refueling outage on 09/24/99, and the licensee |
| stated that there was no loss of shutdown cooling. Reactor coolant system |
| was at 188�F and depressurized. |
| |
| Weather reports indicate that the storm has moved to the east. |
| |
| The licensee notified the NRC resident inspector, the state of South |
| Carolina, and Darlington, Lee, and Chesterfield Counties. The NRC senior |
| resident inspector was on site at the time of this event notification. In |
| addition to the notifications referenced above, the NRC operations officer |
| notified the Department of Energy (Brown), Environmental Protection Agency |
| via the National Response Center (Gauthier), U.S. Department of Agriculture |
| (Conley), Department of Health and Human Services (Wilson), and Federal |
| Emergency Management Agency (Stinedurf). |
| |
| *************** UPDATE AT 2224 ON 09/29/99 FROM HAROLD CHERNOFF TO LEIGH |
| TROCINE ************** |
| |
| The Alert was terminated at 2203. The licensee notified the NRC resident |
| inspector, the state of South Carolina, and Darlington, Lee, and |
| Chesterfield Counties. The NRC operations center notified the R2DO |
| (Bernhard), NRR EO (Marsh), IRO (Congel and Giitter), NRR (Collins), Region |
| 2 (Bonser, Plisco, Reyes, Trojanowski, and Vias), and EDO (Miraglia). In |
| addition, the NRC operations officer notified the Department of Energy |
| (Brown), Environmental Protection Agency via the National Response Center |
| (Robertson), U.S. Department of Agriculture (Conley), Department of Health |
| and Human Services (Wilson), and Federal Emergency Management Agency |
| (Stinedurf). |
| |
| *************** UPDATE AT 2240 ON 09/29/99 FROM HAROLD CHERNOFF TO LEIGH |
| TROCINE ************** |
| |
| At 2240, a follow-up notification was made to update NRC managers on the |
| status of the plant and to provide notification pursuant to |
| 10CFR50.72(b)(2)(vi). The following text is a portion of a facsimile |
| received from the licensee: |
| |
| "No injuries have been identified. Minor damage to non-power block |
| buildings. A tree was identified leaning on a branch feeder to non-power |
| block buildings. Tenting material from the turbine deck was reported on the |
| roof of the control room. No damage to the control room was incurred (as |
| verified by a pressurization test). Offsite power remained available. |
| Both RHR pumps were available. [The] 'A' RHR [pump] was in operation. [The] |
| 'A' emergency diesel generator and dedicated shutdown diesel were operable |
| but not in operation. Security systems were being powered by the security |
| emergency diesel generator." |
| |
| The licensee notified the NRC resident inspector, the state of South |
| Carolina, and Darlington, Lee, and Chesterfield Counties. |
| |
| *************** UPDATE AT 2257 ON 09/29/99 FROM HAROLD CHERNOFF TO LEIGH |
| TROCINE ************** |
| |
| The licensee called to ensure that the offsite notifications were added to |
| the list of reporting criteria. |
| |
| *************** UPDATE AT 2400 ON 09/29/99 BY LEIGH TROCINE ************** |
| |
| A Commissioners' Assistants' Briefing was conducted at midnight on 09/29/99. |
| The following notifications were made (*office did not participate): IRO |
| (*Giitter), Chairman Dicus (Boyce), Commissioner Diaz (Hsia), Commissioner |
| McGaffigan (Sharkey), Commissioner Merrifield (Doane), EDO (Satorius), DEDE |
| (Paperiello), NRR (*Dennig), NRR EO (Marsh), R2DO (*Berhhard), OPA |
| (Beecher), CAO (Madden), SECY (Hart), OSP (Lohaus), OIP (*Hauber). The NRR |
| EO (Marsh) was the briefer. |
| |
| The licensee issued a press release. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 36244 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: HOPE CREEK REGION: 1 |NOTIFICATION DATE: 09/29/1999|
| UNIT: [1] [] [] STATE: NJ |NOTIFICATION TIME: 22:22[EDT]|
| RXTYPE: [1] GE-4 |EVENT DATE: 09/29/1999|
+------------------------------------------------+EVENT TIME: 21:33[EDT]|
| NRC NOTIFIED BY: KEN BRESLIN |LAST UPDATE DATE: 09/30/1999|
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: UNU |DAVID SILK R1 |
|10 CFR SECTION: |LEDYARD (TAD) MARSH NRR |
|AAEC 50.72 (a) (1) (I) EMERGENCY DECLARED |JOSEPH GIITTER IRO |
| |STINEDURF FEMA |
| |FRANK CONGEL IRO |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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
+------------------------------------------------------------------------------+
| UNUSUAL EVENT DECLARED DUE TO A FREON LEAK FROM A CONTROL ROOM CHILLER INTO |
| THE AUXILIARY BUILDING |
| |
| The licensee declared the unusual event at 2133 on 09/29/99 due to a release |
| of toxic gas (a Freon leak) deemed to be detrimental to safe operation of |
| the plant. No radiological release is in progress. The 33' wind direction |
| is from 146� at 17.9 miles per hour. There were no protective actions |
| recommended. |
| |
| At 2117 hours on 09/29/99, the 'B' control room ventilation train chiller |
| tripped resulting in an automatic start of the 'A' control room ventilation |
| train. The trip was the direct result of a major freon leak dispersing into |
| the auxiliary building. All non-essential personnel were evacuated from the |
| auxiliary building. An Unusual Event was declared at 2133 hours on 09/29/99 |
| in accordance with Emergency Classification Guidance Section 9.4.1.B, |
| release of toxic gas deemed detrimental to safe operation of the plant. No |
| personnel injuries have occurred, and all access to the auxiliary building |
| is being controlled until follow-up actions are complete. |
| |
| The 'A' control room vent train is currently in service. There is no |
| indication of any freon in the control room, and the control room was not |
| placed on recirculation. |
| |
| The licensee plans to terminate the Unusual Event when the freon leak is |
| isolated and when air levels in the auxiliary building are restored to |
| normal. |
| |
| The licensee stated that the emergency response data system (ERDS) has not |
| been activated because ERDS is down for the performance of Y2K upgrades. |
| |
| The licensee notified the NRC resident inspector, the states of Delaware and |
| New Jersey, and the Lower Alloways Creek Township. |
| |
| ******************** UPDATE AT 0204 ON 09/30/99 FROM KEN BRESLIN TO DOUG |
| WEAVER ******************** |
| |
| The leak was terminated because the full freon charge in the chiller |
| dispersed (2,200 pounds), and the atmosphere in the auxiliary building has |
| been restored to normal. As a result, the licensee terminated the Unusual |
| Event at 0158 hours on 09/30/99. |
| |
| The licensee notified the NRC resident inspector, the states of Delaware and |
| New Jersey, and the Lower Alloways Creek Township. The NRC operations |
| officer notified the R1DO (Silk), NRR EO (Marsh), IRO (Giitter), and FEMA |
| (Caldwell) |
+------------------------------------------------------------------------------+
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Page Last Reviewed/Updated Thursday, March 25, 2021