U.S. Nuclear Regulatory Commission Operations Center Event Reports For 04/17/95 - 04/18/95 ** EVENT NUMBERS ** 28619 28697 28698 28699 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28619 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SOUTH TEXAS REGION: 4 |NOTIFICATION DATE: 03/31/95 | |UNIT: [1] [ ] [ ] STATE: TX |NOTIFICATION TIME: 17:42 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 03/31/95 | +------------------------------------------------+EVENT TIME: 15:50[CST]| |NRC NOTIFIED BY: HESSLING |LAST UPDATE DATE: 04/17/95 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |HARRELL RDO | |NLTR LICENSEE 24 HR REPORT | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE 24-HOUR REPORT DUE TO INOPERABLE PERSONNEL AIRLOCK | | | | THE FOLLOWING IS TEXT OF A FACSIMILE SUBMITTED BY THE LICENSEE: | | | | "IN ACCORDANCE WITH SECTION 2.G OF OPERATING LICENSE NPF-76, A 24 HOUR | | REPORT IS BEING MADE DUE TO OPERATION NOT IN ACCORDANCE WITH TECHNICAL | | SPECIFICATIONS. | | | | A LOCAL LEAK RATE TEST WAS PERFORMED ON THE INNER DOOR OF THE PERSONNEL | | AIRLOCK (PAL) ON MARCH 30, 1995, WHICH IDENTIFIED LEAKING EQUALIZING | | VALVES. INDICATIONS ARE THAT THIS CONDITION HAD EXISTED SINCE MAINTENANCE | | WAS PERFORMED WITH THE PLANT IN MODE 1 AT 100% POWER ON FEBRUARY 28, 1995. | | | | SINCE THE AIRLOCK WAS THOUGHT TO BE OPERABLE BECAUSE POST-MAINTENANCE | | TESTING DID NOT REVEAL THE LEAKAGE, THE OUTER DOOR WAS NOT LOCKED IN | | ACCORDANCE WITH TECHNICAL SPECIFICATION 3.6.1.3 ACTION a.1, AND ACCESS TO | | THE REACTOR CONTAINMENT BUILDING WAS ALLOWED THROUGH THE AIRLOCK FOR 1RE05 | | PREPARATIONS. | | | | THE RCB AIRLOCK WAS THOUGHT TO BE OPERABLE FOR TECHNICAL SPECIFICATION | | REQUIREMENTS FOR APPROXIMATELY 95 HOURS FROM 2/28/95 AT 1707 THROUGH MODE 5 | | ENTRY ON 3/4/95 AT 1603." | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED OF THIS NOTIFICATION BY THE | | LICENSEE. | | | | | | * * * UPDATE AT 1643 ON 04/17/95 BY PINZON ENTERED BY HOO JOLLIFFE * * * | | | | AFTER FURTHER REVIEW OF AVAILABLE INFORMATION, LICENSEE DESIRES TO RETRACT | | THIS EVENT FOR THE FOLLOWING REASONS: | | - LICENSEE BELIEVES THAT THE LEAK TEST PERFORMED ON 02/28/95 WAS AN | | ADEQUATE POST MAINTENANCE TEST AND THAT THE PERSONNEL AIRLOCK WAS | | OPERABLE AFTER COMPLETION OF THIS TEST; | | - THE EXACT TIME OF OCCURRENCE OF THE FAILURE BETWEEN 02/28/95 AND THE | | TIME OF DISCOVERY OF THE FAILURE ON 03/08/95 COULD NOT BE DETERMINED; | | - THE TECH SPEC LCO ACTION STATEMENT WAS NOT APPLICABLE AT THE TIME OF | | DISCOVERY SINCE UNIT 1 WAS IN MODE 5 (COLD SHUTDOWN) AT THE TIME. | | | | THUS, THE LICENSEE WAS NOT IN VIOLATION OF A TECH SPEC LCO ACTION STATEMENT | | AT THE TIME OF DISCOVERY OF THE FAILURE. | | | | LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | HOO NOTIFIED R4DO CHUCK CAIN. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28697 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FT CALHOUN REGION: 4 |NOTIFICATION DATE: 04/17/95 | |UNIT: [1] [ ] [ ] STATE: NE |NOTIFICATION TIME: 00:02 [ET]| |RX TYPE: [1] CE |EVENT DATE: 04/16/95 | +------------------------------------------------+EVENT TIME: 20:20[CDT]| |NRC NOTIFIED BY: POHL |LAST UPDATE DATE: 04/17/95 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |COLLINS RDO | |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 30 POWER OPERATION | 30 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE NOTIFIED LOCAL SHERIFF OF GUNSHOTS COMING FROM BOAT ON MISSOURI | | RIVER. | | | | THE FOLLOWING IS TEXT OF A FACSIMILE SUBMITTED BY THE LICENSEE: | | | | "AT 2018 ON 4/16/95, THE CONTROL ROOM WAS NOTIFIED THAT A BOAT ON THE | | MISSOURI RIVER WAS FIRING GUN SHOTS. SECURITY WAS IMMEDIATELY NOTIFIED AND | | THE BOAT WAS PLACED UNDER SURVEILLANCE WITH TELEPHOTO CAMERAS. THE | | WASHINGTON COUNTY SHERIFF'S OFFICE WAS NOTIFIED AT 2020 AND A DESCRIPTION | | OF THE BOAT AND ITS OCCUPANTS WAS GIVEN. IT COULD NOT BE DETERMINED IF THE | | GUNFIRE WAS DIRECTED AT THE FACILITY OR THE OPPOSITE RIVER BANK. NO DAMAGE | | TO SITE PERSONNEL OR PROPERTY HAS BEEN DISCOVERED." | | | | THE LICENSEE HAS NOTIFIED THE NRC RESIDENT INSPECTOR OF THIS EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28698 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DUANE ARNOLD REGION: 3 |NOTIFICATION DATE: 04/17/95 | |UNIT: [1] [ ] [ ] STATE: IA |NOTIFICATION TIME: 08:24 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 04/17/95 | +------------------------------------------------+EVENT TIME: 06:58[CDT]| |NRC NOTIFIED BY: CURTLAND |LAST UPDATE DATE: 04/17/95 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CLAYTON RDO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 0 STARTUP | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TECHNICAL SPECIFICATION SHUTDOWN REQUIRED DUE TO INSUFFICIENT SHUTDOWN | | MARGIN. | | | | WHILE STARTING UP THE UNIT FROM A REFUELING OUTAGE, THE LICENSEE WAS | | ATTEMPTING TO DEMONSTRATE SHUTDOWN MARGIN IN ACCORDANCE WITH PLANT | | TECHNICAL SPECIFICATIONS (TS). THE TS REQUIRES THAT A MINIMUM 0.38% DELTA | | K/K SHUTDOWN MARGIN BE AVAILABLE; HOWEVER, THE LICENSEE WAS ABLE TO | | DEMONSTRATE ONLY A 0.33% DELTA K/K SHUTDOWN MARGIN. THE LICENSEE REPORTED | | THAT THE UNIT WENT CRITICAL UPON THE WITHDRAWAL OF THE CONTROL ROD BEFORE | | THE ONE PREDICTED BY STATION NUCLEAR ENGINEERING. | | | | ALL CONTROL RODS HAVE BEEN INSERTED INTO THE CORE, AND THE UNIT HAS BEEN | | TAKEN TO COLD SHUTDOWN CONDITIONS. THE LICENSEE PLANS TO CONTACT GENERAL | | ELECTRIC AND CONFIRM THE SHUTDOWN MARGIN CALCULATIONS. THE NRC RESIDENT | | INSPECTOR HAS BEEN INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28699 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CRYSTAL RIVER REGION: 2 |NOTIFICATION DATE: 04/17/95 | |UNIT: [3] [ ] [ ] STATE: FL |NOTIFICATION TIME: 16:41 [ET]| |RX TYPE: [3] B&W-L-LP |EVENT DATE: 04/17/95 | +------------------------------------------------+EVENT TIME: 16:01[EDT]| |NRC NOTIFIED BY: STEPHENSON |LAST UPDATE DATE: 04/17/95 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |KERRY LANDIS RDO | |AOUT 50.72(b)(1)(ii)(B) OUTSIDE DESIGN BASIS | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 3 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - BWST LEVEL INSTRUMENTS OPERATED AT TEMPERATURES BELOW ANALYZED - | | | | AT 1601 ON 04/17/95, LICENSEE DETERMINED THAT ALL BORATED WATER STORAGE | | TANK LEVEL INSTRUMENTATION MAY HAVE BEEN EXPOSED TO AMBIENT TEMPERATURES | | LOWER THAN THE OPERATING RANGE USED IN INSTRUMENT ACCURACY CALCULATIONS. | | | | THIS OCCURRED WHEN A DOOR BETWEEN THE OUTSIDE AIR AND THE ROOM CONTAINING | | THE INSTRUMENTATION WAS PROPPED OPEN FROM 01/31/95 TO 02/17/95 WHILE WORK | | WAS BEING PERFORMED IN THE ROOM. | | | | DURING THIS PERIOD, OUTSIDE AIR TEMPERATURE DROPPED TO LESS THAN 40 øF, THE | | MINIMUM TEMPERATURE ASSUMED IN INSTRUMENT ACCURACY CALCULATIONS. DURING | | THIS PERIOD, THE LOWEST OUTSIDE AIR TEMPERATURE REACHED WAS 26 øF FOR | | APPROXIMATELY 1 HOUR. | | | | THUS THE INSTRUMENTATION MAY HAVE OPERATED FOR A SHORT TIME AT AN AMBIENT | | TEMPERATURE BELOW THE TEMPERATURE FOR WHICH IT WAS ANALYZED, WHICH MAY HAVE | | AFFECTED ITS ACCURACY. | | | | LICENSEE IS INVESTIGATING THE CAUSE AND DETERMINING CORRECTIVE ACTIONS. | | | | LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+