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Home NRC Library Document Collections Events, Reports Associated with Part 21 Reports 1996

Part 21 Report - 1996-631

 
 
ACCESSION #: 9607180070

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POWER REACTOR                           EVENT NUMBER: 30752

FACILITY: SUMMER         REGION: 2      NOTIFICATION DATE:  07/15/96
UNIT: [1] [ ] [ ]        STATE: SC      NOTIFICATION TIME:  16:15 [ET]
RX TYPE: [1] W-3-LP                     EVENT DATE:         05/17/96
                                        EVENT TIME:         00:00[EDT]
NRC NOTIFIED BY: ZACCONE                LAST UPDATE DATE:   07/15/96
HQ OPS OFFICER:  BOB STRANSKY

                                             NOTIFICATIONS

EMERGENCY CLASS: NOT APPLICABLE
10 CFR SECTION:
CDEF 21.21(b)(2)    DEFECTS/NONCOMPLIANCE
                                        V.  HODGE           NRR

UNIT SCRAM CODE RX CRIT INIT PWR INIT RX MODE     CURR PWR CURR RX
MODE

1        N         N        0      HOT SHUTDOWN        0    HOT SHUTDOWN

                               EVENT TEXT

10 CFR PART 21 REPORT REGARDING FAILURES OF ABB/ITE 27N RELAYS.

THE FOLLOWING IS TEXT OF A FACSIMILE SUBMITTED BY THE LICENSEE:
"NONCONFORMANCE NOTICE 5472 REPORTS THE THIRD FAILURE OF ABB/ITE 27N
RELAYS AT V.C.  SUMMER NUCLEAR STATION WITHIN A THREE YEAR PERIOD.  IN
EACH CASE, THE TIMER INTEGRATED CIRCUIT US WAS DETERMINED TO BE
DEFECTIVE.  IN ALL CASES, V.C.  SUMMER NUCLEAR STATION ENSURED THAT
THE
ASSOCIATED APPLICATIONS WERE RESTORED TO OPERABLE STATUS UPON
IDENTIFICATION, REPLACEMENNT AND TESTING OF THE RESPECTIVE 27N
RELAYS.
ABB HAS NOT ESTABLISHED A ROOT CAUSE FOR WHAT APPEARS TO BE A
REPETITIVE
FAILURE OF THE US TIMER.  THIS REPORT IS BEING MADE PURSUANT TO 10 CFR
PART 21."

THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED BY THE LICENSEE.

Form "EVENT NOTIFICATION WORKSHEET" omitted.

Form "SUBSTANTIAL SAFETY HAZARD (SSH) EVALUATION TRACKING SHEET"
omitted.

*** END OF DOCUMENT ***

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