ML20199B315
| ML20199B315 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/03/1986 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 1-SR-86-049, 1-SR-86-49, ANPP-36743-EEVB, NUDOCS 8606170109 | |
| Download: ML20199B315 (2) | |
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RECElvia im Arizona Nuclear Power Project JT1 -S pll l: gn P.O. BOX 52034 e PHOEN!X, ARIZONA 85072-2034 Y0I0li ')lR :
June 3, 1986 ANPP-36743-EEVB/PGN/98.05 Mr. John B. Martin, Regional Administrator Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region V 1450 Marie Lane, Suite 210 Walnut Creek, CA 94596-5368
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Unit 1 Docket No. STN 50-528 (License NPF-41)
Special Report SR-86-049 File: 86-020-404
Dear Mr. Martin:
Attached please find a Special Report (1-SR-86-049) voluntarily submitted, for informational purposes only.
This report discusses an event that was reported to the NRC Operations Center, but was later determined to not be reportable.
If you have any questions, please contact me.
Very truly yours, A
A E. E. Van Brunt, Jr.
Executive Vice President Project Director EEVB/PGN/jle Attachment cc:
R. P. Zimmerman (all w/a)
A. L. Hon E. A. Licitra A. C. Gehr INPO Records Center 8606170109 860603
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PAID VERDE NUCLEAR GENERATING STATION UNIT 1 Docket No. 50-528 License No. NPF-41 Special Report 1-SR-86-049 Voluntary Report Clarifying the Call Made to the NRC Operations Center on May 5, 1986 This voluntary special report is being submitted to clarify the Engineered Safety Features actuation reported to the NRC Operations Center via the Emergency Notification System at 0735 MST on May 5,1986.
At 0629 on May 5,
1986, Unit 1 was in Mode 5 (COLD SHUTDOWN) when Instrumentation and Control technicians were preparing to deenergize the Train "B" Balance of Plant / Engineered Safety Features Actuation System (BOP /ESFAS) to replace several modules.
During the disabling of the loss of power load shed relay, one of the technicians inadvertently grounded a wire, which caused a loss of power to the Train "B"
Shutdown Cooling Ioop and the Train "B"
battery chargers.
The ACTION Statements for Technical Specification 3.4.1.4.1 and 3.8.1.2 were entered at this time.
Shutdown cooling was restored within 7 minutes and ACTION Statement 3.4.1.4.1(b) was exited.
Power was returned to the battery chargers after 26 minutes and the ACTION Statement for Technical Specification 3.8.1.2 was exited.
" Actuation" of multichannel ESF Actuation Systems is defined by NUREG-1022 as actuation of enough channels to couplete the minimum actuation logic (i.e.,
activation of sufficient channels to cause activation of the ESF Actuation System).
'Ihere fore, single channel actuation, whether caused by failures or otherwise, are not reportable if they do not complete the minimum actuation logic.
During this event, an Engineered Safety Features actuation did not occur since the minimum actuation logic was not activated.
Therefore, this event is not reportable.
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