ML20137Y455

Special Rept (1-SR-86-003):on 860122,72 H Action Statement for Operability of Vent high-range Radiation Monitor RU-144 Exceeded.Caused by Time Spent Troubleshooting on Monitor RU-143

ML20137Y455
Person / Time
Site:	Palo Verde
Issue date:	02/21/1986
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-86-003), (1-SR-86-3), ANPP-35266-EEVB, NUDOCS 8603120278
Download: ML20137Y455 (2)

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. t PALO VERDE NUCLEAR GENERATING STATION UNIT 1 Special Report No.1-SR-66-003 RADIATIOh h0NITORING UNIT NOT RESTORED TO OPERABLE STATUS WITHIN 72 HOURS Docket No. STN 50-528 License No. NPF-41 l

At 1442, on January 22,1986, 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 Plant Vent High Range Radiation Monitor (RU-144) was exceeded. The monitor was declared inoperable on January 19, 1986, as a result of the Plant Vent Iow Range Radiation Monitor (RU-143) being declared inoperable due to spurious indication of high radiation. This spurious indication was verified to be invalid by sampling.

The system is designed so that inoperability of the low range monitor renders the high range monitor inoperable. RU-144 remained inoperable for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> due to troubleshooting on RU-143. The cause of the radiation signal increases in RU-143 is under investigation.

A special report is required and made pursuant to Palo Verde Unit 1 Technical Specification Table 2.13-13 ACTION 42-b and Technical Specification 6.9.2.

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I 9603120278 860221 PDR ADOCM 05000528 9 PDR

Arizona Nuclear Power Project P O Box 52034

• PHCENIX, ARIZONA 85072-2034 February 21,.1986 ANPP-35266-EEVB/Kil'/98.05 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 S4 o

Subject:

Palo Verde Nuclear Generating Station (PVNGS) a 3 3 Unit 1 y g .;y Docket No. STN 50-528 (License NPF-41) i en ag Special Report - Radiation Monitoring Unit 2 .c c Not Restored Within 72 flours 3 "

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File: 86-020-404; G.1.01.10 N ea

Dear Mr. Martin:

t Attached please find a Special Report (1-SR-86-003) prepared and submitted pursuant to. Technical Specifications 3.3.3.9 and 6.9.2. This report discusses inoperability of a plant vent high range radiation monitor. A follow-up report is scheduled for submittal by August 1, 1986.

If you have any questions, please contact me.

Very truly yours h ALW E. E. Van Brunt, Jr.

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

A. L. Ilon E. A. Licitra A. C. Gehr INPO Records Center

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