ML20136E715

Special Rept 1-SR-85-032:on 851128,72 H Action Statement for Operability of Containment high-range Radiation Monitor RU-148 Exceeded.Caused by Defective Part.Monitor Will Be Restored to Operable Status During Mar 1986 Planned Outage

ML20136E715
Person / Time
Site:	Palo Verde
Issue date:	12/27/1985
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-85-032, 1-SR-85-32, ANPP-34347-EEVB, NUDOCS 8601070107
Download: ML20136E715 (2)

Text

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, RP Arizona Nuclear Power Project 1585 DEC 20 @ @ $m esotsix. Anizonasso72 2o34 MG!0N VIAF December 27, 1985 ANPP-34347-EEVB/PGN-98.07 Mr. John B. Martin, Regional Administrator Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region V 1450 Maria 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 - Radiation Monitoring Unit not restored within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> File 85-020-404: G.1.01.10

Dear Mr. Martin:

Attached please find a Special Report (1-SR-85-032) prepared and submitted pursuant to Technical Specifications 3.3.3.1 and 6.9.2. This report discusses inoperability of a containment high range radiation monitor. A follow-up report is scheduled for submittal by April 1, 1986.

. -If you have any questions, please contact me.

Very tr ly your , , _

M /\ LUL -

E. E. Van Brunt, Jr.

Executive Vice President Project Director EEVB/PGN/rw Attachment cc: R. P. Zimmerman (all w/a)

A. L. Hon E. A. Licitra A. C. Gehr INPO Records Center 0601070107 DR 851227 --

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o Attachment to ANPP- 34347 PALO VERDE NUCLEAR GENERATING STATION UNIT 1 RADIATION MONITORING UNIT NOT RESTORED WITHIN 72 HOURS Docket No. STN-50-528 License No. NPF-41 Special Report No. 1-SR-85-032 At 2026 on November 28, 1985, the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> action statement for operability of the containment high range radiation monitor (RU-148) was exceeded. The monitor was declared inoperable at 2026 on Nove.-ber 25, 1985 due to a detector high voltage failure alarm. A work authorization document was issued to troubleshoot the cause of the alarms, and the problem was identified to be inside containment.

Emergency Plac Implementing Procedure #14A, which allows the use of external detec-tors (RU-158 B&C, or RU-37 & 38) when the containment high range monitors are inoper-able, is a compensatory measurp in this event.

The root cause of this event appears to be a defective part.

The corrective action, to be performed during the first planned outage (scheduled for March, 1986), is to restore this monitor to operable status. The corrective action will be completed during this outage to minimize personnel exposure inside the containment.

A special report is required and made pursuant to Action 27-3 of Palo Verde Unit 1 Technical Specification Table 3.3-6 and Technical Specification 6.9.2. A follow-up report is scheduled for submittal by April 1, 1986.

I