ML20202D690

Special Rept 1-SR-86-069:on 860611,five Inoperable Heated Junction Thermocouple Sensors Not Returned to Svc within 7 Days.Cause of Inoperable Sensors Not Determined.Addl Troubleshooting Required

ML20202D690
Person / Time
Site:	Palo Verde
Issue date:	07/03/1986
From:	Gaynes J, Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
1-SR-86-069, 1-SR-86-69, ANPP-00007-JGH, ANPP-7-JGH, ANPP-7-JGH-T, NUDOCS 8607140197
Download: ML20202D690 (2)

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l A .: teed I a .. y Arizona Nuclear Power Project , 4 pu D i " -

P O box 52034 e PHOENIX. ARIZONA 85072-2034 ,fJ .

July 3, 1986 ,,.

ANPP-00007-JGH/TDS/E5p/96.'0'3 Mr. John B. Martin, Regional Administrator Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region V 1450 Maria Lane, Suite 210 k'alnut Creek, CA 94596-5368

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 1 Docket No. STN 50-528 (License NPF-41)

Special Report-1-SR-86-069 File: 86-A-056-026

Dear Mr. Martin:

Attached please find a Special Report (1-SR-86-069) prepared and submitted pursuant to Technical Specifications 3.3.3.6 and 6.9.2. This report discusses one less than minimum channels operable in Post Accident Monitoring System.

If you have any questions, please contact T. R. Bradish, Compliance Supervisor at (602)932-5300 Ext.6936.

Very truly yours, M

J. G. Haynes Vice President Nuclear Production JGH/ ESP /dh Attachment cc: R. P. Zimmerman (all w/a)

A. L. Hon E. A. Licitra A. C. Gehr INPO Records Center E. E. Van Brunt, Jr.

8607140197 860703 J PDR ADOCK 05000528 i[

S PDR j

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Attachmt it to ANPP 00007 PALO VERDE NUCLEAR GENERATING STATION UNIT 1

' One Less Than Minimum Channel Operable in Post Accident Monitoring System License No. NPF-41 Docket No. 50-528 Special Report 1-SR-86-069 4

I This Special Report is provided pursuant to Palo Verde Unit 1 Technical

! Specification 3.3.3.6, Table 3-3-10 ACTION 32, and to provide information 4

regarding inoperable channels in the Qualified Safety Parameter Display i System. Technical Specification 3.3.3.6 requires four of eight channels to be operable. The Action Statement requires that the minimum number of channels be restored to operability within seven days.

i j On June 4, 1986, five of eight Heated Junction Thermocouple sensors j experienced intermittent inoperability and were declared inoperable. This i is one less than the required minimum number of :nannels. Work documents j were issued to troubleshoot and repair the sensccs as applicable.

On June 11, 1986, the 7 day ACTION was met without restoration of the

] required number of channels, resulting in submittal of this Special Report.

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] The troubleshooting performed thus far has indicated intermittent openings

in the heater circuits; however, the actual root cause has not been i determined. Additional troubleshooting is required and is scheduled to be i performed during the refueling outage based upon ALARA considerations.

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