U.S. Nuclear Regulatory Commission Operations Center Event Reports For 05/25/95 - 05/26/95 ** EVENT NUMBERS ** 28851 28852 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28851 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SALEM REGION: 1 |NOTIFICATION DATE: 05/25/95 | |UNIT: [1] [2] [ ] STATE: NJ |NOTIFICATION TIME: 02:56 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 05/25/95 | +------------------------------------------------+EVENT TIME: 02:30[EDT]| |NRC NOTIFIED BY: SAUER |LAST UPDATE DATE: 05/25/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LARRY NICHOLSON 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | CONTROL ROOM VENTILATION SYSTEM OUTSIDE OF DESIGN BASES | | | | FOLLOWING IS TEXT OF A LICENSEE SUBMITTED FACSIMILE: | | | | "DURING A DESIGN REVIEW OF THE CONTROL AREA VENTILATION SYSTEM, IT WAS | | DETERMINED THAT THE SYSTEM MAY NOT MEET THE SINGLE FAILURE DESIGN | | REQUIREMENT. THIS IS DUE TO THE FACT THAT THE INITIATOR CIRCUITS FROM | | EITHER A CONTROL ROOM RAD MONITOR OR SSPS (SOLID STATE PROTECTION SYSTEM) | | INITIATION SIGNAL ARE NOT REDUNDANT TO EACH OTHER. THIS MEANS THAT A | | FAILURE OF ONE OF THE CIRCUITS WOULD INHIBIT THE VENTILATION SYSTEM FROM | | GOING INTO A FULL RECIRCULATION MODE. EQUIPMENT AFFECTED BY THIS ARE SOME | | ISOLATION DAMPERS FOR THE CONTROL AREA HALLWAY, WHICH SERVES AS THE OSC | | DURING EMERGENCY PLAN CONDITIONS, CERTAIN CHILLED WATER VALVES AND BATTERY | | ROOM EXHAUST FANS. UNTIL A MORE DETAILED INVESTIGATION IS COMPLETED WE ARE | | CONSERVATIVELY REPORTING THESE CONDITIONS AS OUTSIDE DESIGN BASIS. | | | | IAW GENERIC LETTER 91-18, CREDIT IS BEING TAKEN FOR OPERATOR RECOGNITION OF | | THE FAILURE AND TAKING MANUAL ACTIONS TO INITIATE FULL RECIRCULATION AS | | ADDRESSED IN CURRENT PROCEDURES." | | | | THE LICENSEE CONSIDERS THE CONTROL ROOM VENTILATION SYSTEM TO BE OPERABLE. | | THE AS-FOUND CONDITION IS ASSUMED TO HAVE EXISTED SINCE THE PLANT WAS | | CONSTRUCTED. THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |GENERAL INFORMATION or OTHER | |EVENT NUMBER: 28852 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: SAXTON NUC EXPERIMENTAL FACILITY |NOTIFICATION DATE: 05/25/95 | | CITY: SAXTON REGION: 1 |NOTIFICATION TIME: 15:22 [ET]| | COUNTY: STATE: PA |EVENT DATE: 05/25/95 | |LICENSE#: DPR-4 AGREEMENT: N |EVENT TIME: 09:00[EDT]| | DOCKET: |LAST UPDATE DATE: 05/25/95 | | +-----------------------------+ | |PERSON ORGANIZATION| | |LARRY NICHOLSON RDO | | | | +------------------------------------------------+ADAMS PM | |NRC NOTIFIED BY: HEYSEK/BYRNE | | |HQ OPS OFFICER: CHAUNCEY GOULD | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE REPORTED THAT THEY HAD GROUND WATER INTRUSION INTO THE | | CONTAINMENT OF THEIR SHUTDOWN DEFUELED RESEARCH REACTOR. | | | | SAXTON NUCLEAR EXPERIMENTAL FACILITY LOCATED IN SAXTON, PA. REPORTED THAT | | WHILE THEY WERE DRILLING FOR A CONCRETE CORE BORE SAMPLE INSIDE OF THEIR | | CONTAINMENT, THEY SLICED A PIECE OF THE STEEL CONTAINMENT WALL WHICH | | RESULTED IN GROUND WATER INTRUSION. THE TOTAL GROUND WATER LEAKAGE INTO THE | | CONTAINMENT FROM A NEARBY RIVER DURING THE 4 HR PERIOD BEFORE IT WAS | | STOPPED WAS 200 GALS. THEY SECURED THE LEAK WITH A MECHANICAL PLUG AND ARE | | REPLACING IT WITH AN TEMPORARY INFLATABLE PLUG WHICH WILL REMAIN INSTALLED | | UNTIL A PERMANENT FIX IS MADE. THE WATER HAS BEEN CLEANED UP AND PLACED IN | | CONTAINERS. NO ANALYSIS HAS BEEN MADE AT THIS TIME TO DETERMINE THE DEGREE | | OF CONTAMINATION OF THE WATER. A PRESS RELEASE WILL BE MADE. | +------------------------------------------------------------------------------+