Event Notification Report for August 18, 1999
U.S. Nuclear Regulatory Commission Operations Center Event Reports For 08/17/1999 - 08/18/1999 ** EVENT NUMBERS ** 36017 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +------------------------------------------------------------------------------+ |Power Reactor |Event Number: 36017 | +------------------------------------------------------------------------------+ +------------------------------------------------------------------------------+ | FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 08/11/1999| | UNIT: [] [2] [] STATE: CT |NOTIFICATION TIME: 14:08[EDT]| | RXTYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 08/11/1999| +------------------------------------------------+EVENT TIME: 13:53[EDT]| | NRC NOTIFIED BY: KEN TRUESDALE |LAST UPDATE DATE: 08/17/1999| | HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+PERSON ORGANIZATION | |EMERGENCY CLASS: N/A |HAROLD GRAY R1 | |10 CFR SECTION: | | |ADEG 50.72(b)(1)(ii) DEGRAD COND DURING OP | | | | | | | | | | | +-----+----------+-------+--------+-----------------+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | |2 N Y 100 Power Operation |100 Power Operation | | | | +------------------------------------------------------------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DISCOVERY OF A HISTORICAL CONDITION INVOLVING LOW DIESEL GENERATOR VOLTAGE | | | | The licensee determined that voltage for the 'B' emergency diesel generator | | would not have met the technical specification criteria, and this rendered | | the 'B' emergency diesel generator inoperable approximately 32 days prior to | | 08/05/99. Although the voltage was discovered to be low during a test run | | of the 'B' emergency diesel generator on 08/05/99, it was thought to be | | acceptable (satisfactory) at the time of the test run. However, subsequent | | engineering review determined that the voltage was in fact below the | | technical specification (TS) acceptance criteria. | | | | The licensee determined this event to be reportable at 1353 on 08/11/99. | | | | The licensee notified the NRC resident inspector. | | | | ******************** UPDATE AT 1435 ON 08/17/99 FROM STEPHEN BAKER TO | | TROCINE ******************** | | | | The following text is a portion of a facsimile received from the licensee: | | | | "Condition Report M2-99-2179[, 'B' Emergency Diesel Generator Slow Start Did | | Not Meet TS Acceptance Criteria,'] was written when it was identified that | | the output voltage for the "B" emergency diesel generator (EDG) did not meet | | the TS acceptance criteria, potentially rendering the diesel inoperable." | | | | "The original reportability determination for this condition concluded that | | this condition was reportable under 10CFR 50.73(a)(2)(i), Technical | | Specifications, and 10CFR50.72(b)(1)(ii), Outside Design Basis, based upon | | initial investigation of the deficiency. Accordingly, a prompt report was | | issued on 08/11/99 per | | 10CFR50.72(b)(1)(ii)." | | | | "Upon further investigation of this condition it was determined that while | | the voltage requirements of the applicable surveillance procedure were not | | met, the requirements of [TS] Surveillance Requirement 4.8.1.1.2.a.2 were | | met. Additionally, it was discovered that the output voltage was set | | sufficiently high during the previous month's surveillance such that the EDG | | would have loaded properly and performed its required safety function(s) | | during the period in question." | | | | "Therefore, this condition is NOT reportable under the requirements of | | 10CFR50.73(5)(2)(i), Technical Specifications, or 10CFR50.72(b)(1)(ii), | | Outside Design Basis, and it is recommended that the associated prompt | | report be retracted." | | | | "Based on the above discussion, this is not a condition which is adverse to | | safety. This deficiency was reviewed against the requirements of | | 10CFR50.72, 10CFR50.73, [and] 10CFR50.9(b), and [it was] determined to be | | not reportable." | | | | The licensee notified the NRC resident inspector. The NRC operations | | officer notified the R1DO (Eselgroth). | +------------------------------------------------------------------------------+
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Page Last Reviewed/Updated Thursday, March 25, 2021