ML20137Y406

Special Rept (2-SR-86-005):on 860125,Tech Spec Action Statement for Operability of Vent high-range Radiation Monitor RU-144 Exceeded.Caused by Energizing Reactor Coolant Pump W/Grounding Straps Still Attached.Procedure Revised

ML20137Y406
Person / Time
Site:	Palo Verde
Issue date:	02/24/1986
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
(2-SR-86-005), (2-SR-86-5), ANPP-35285-EEVB, NUDOCS 8603120265
Download: ML20137Y406 (2)

Text

3 Arizona Nuclear Power Project P O. box $2034 e PHOENIX. ARIZONA 85072 2034 February 24, 1986 ANPP-35285-EEVB/KLM/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 35 Walnut Creek, CA 94596-5638 $

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Subject:

Palo Verde Nuclear Generating Station (PVNGS) g p Q t, ,

Unit 2 9 -4 82 2 '

Docket No. STN 50-529 (License NPF-46) 2 E Special Report - Radiation Monitoring Unit

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Not Restored Within 72 Hours @

File: 86-020-404 G.1.01.10 $

l> ear Mr. hartin:

Attached please find a Special Report (2-SR-86-005) prepared and submitted pursuant to Technical Specification 3.3.3.9 and 6.9.2. This report discusses inoperability of a Plant Vent High Range Radiation Monitor.

11 you have any questions, please contact me.

Very truly yours, c-

, CQt n LLL i m E. E. Van Brunt, Jr.

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

A. L. Hon E. A. Licitra A. C. Gehr INPO Records Ccenter 9603120265 960224 DR ADOCK 0 % DR 59  %

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• AtilcbmsnttoANPP-35285 PALO VERDE NUCLEAR GENERATING STATION UNIT 2 Special Report No. 2-SR-86-005 RADIATION MONITORING UNIT NOT RESMRED WITHIN 72 HOURS Docket No. STN-50-529 License No. NPF-46 At 0645 on January 25, 1986, the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> Technical Specification ACTION Statement for operability of the Plant Vent High Range Radiation Monitor (RU-144) was exceeded. We monitor was declared inoperable on January 22, 1986, as a result of the Plant Vent Low Range Radiation Monitor (RU-143) bring declared inoperable due to a failure of the counting functions.

We cause of the counting functions inoperability was the result of energizing a reactor coolant pump with the grounding straps still attached. We resultant surge on the ground system caused a detector and amplifier /descriminator board failure in RU-143.

We corrective action taken was the repair and calibration of RU-143, he monitoring unit was returned to service on February 10, 1986. In addition, procedural changes are being made to prevent energizing a reactor coolant pump with the grounding straps attached.

A special report is required and made pursuant to Palo Verde Unit 2 Technical Specification Table 3.3-13 ACTION 42-b and Technical Specification 6.9.2.

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