ML20214N937
| ML20214N937 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 09/03/1986 |
| From: | Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 2-SR-86-029, 2-SR-86-29, ANPP-00057-JGH, ANPP-57-JGH, NUDOCS 8609170178 | |
| Download: ML20214N937 (2) | |
Text
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h l* lg P.O. box 52034 e PHoENX, AR: ZONA 85072-2034 September.3,.1986 REGIO 11yn,c ANPP-00057-JGH/TDS/ ESP-96.03 Mr. John B. Martin, Regional Administrator Offico 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 2 Docket No. STN S0-529 (License NPF-51)
Special Report-2-SR-86-029 2
File:
86-020-404
Dear Mr. Martin:
Attached please find Special Report (2-SR-86-029) prepared and submitted pursuant to Technical Specifications 3.3-6 and 6.9.2.
This report discusses a radiation monitoring unit not restored to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
If you have any questions, please contact T. R. Bradish, Compliance Supervisor at (602)932-5300 Ext. 6936.
Very truly yours, VLL M&;
J. G. Haynes Vice President Nuclear Production JGH/ ESP /dh Attachment cc:
- 0. M. DeMichele (all w/a)
E. E. Van Brunt, Jr.
R. P. Zimmerman A. L. IIon E. A. Licitra A. C. Gehr INP0 Records Center g((
8609170178 860703
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PALO VERDE NUCLEAR GENERATING STATION UNIT 2 RADIATION MONITORING UNIT NOT RESTORED TO OPERABLE STATUS WITHIN 72 HOURS Docket No. STN 50-529 License No.
Special Report 2-SR-86-029 This Special Report is provided pursuant to Palo Verde Unit 2 Technical Specification Table 3 3-6 ACTION 27-3, and to provide information regarding a Radiation Monitoring Unit not restored to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
At 0450 on August 1, 1986, the Containment Building Atmosphere Radiation Monitor (RU-1) was declared IN0PERABLE when two channels (containment atmosphere particulate radioactivity monitoring system channel and containment atmosphere gaseous radioactivity monitoring system channel) did not operate within the design specification. Efforts to return the monitor to service were unsuccessful within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> allocated under the action statement.
In accordance with Technical Specification 3.3-6, ACTION 27-2, a portable air monitor (RU-53) was immediately placed in service at 0525 as a compensatory measure. This monitor will satisfy the requirement to sample containment air for particulate and gaseous releases.
The investigation to determine the root cause was initiated under work order 167534 The root cause of this event was believed to be a defective suction pump. A new pump was installed. The post maintenance functional test further revealed that the monitor discharge solenoid valve was restricting sample flow as a result of a faulty diaphragm. The valve was rebuilt and installed per vendor specifications. The radiation monitor flow system was calibrated and RU-1 was returned to OPERABLE status on August 7, 1986 at 1642.