ML20137Z228
| ML20137Z228 | |
| 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-86-005, 1-SR-86-5, ANPP-35267-EEVB, NUDOCS 8603120511 | |
| Download: ML20137Z228 (2) | |
Text
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Arizona Nuclear Power Project P O BOX 52034 e PHOENIX, ARIZONA 85072-2034 February 21, 1986 ANPP-35267-EEVB/KIJf/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
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Walnut Creek, CA 94596-5368 1
Subject:
Palo Verde Nuclear Generating Station (PVNGS) yi j
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Unit 1 c'.
cn Docket No. STN 50-528 (License NPF-41)
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";6 Special Report - Radiation Monitoring Unit
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U Not Restored Within 72 flours tv File: 86-020-404 G.I.01.10 c
Dear Mr. Martin:
Attached please find a Special Report (1-SR-86-005) prepared.and submitted pursuant to Technical Specifications 3.3.3.1 and 6.9.2. This report discusses inoperability of a condensor evacuation system high range radiation monitor.
If you have any questions, please contact me.
Very truly yours CLLL
%LL b E. E. Van Brunt, Jr.
Executive Vice President Project Director EEVB/JK0/rw Attachment cc:
R. P. Zimmerman (all w/a)
A. L. lion E. A. Licitra A. C. Gehr s
INPO Records Center fly
,I 8603120511 860221 g_Ll PDR ADOCK 05000528
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PALO VERDE NUCLEAR GENERATING STATION Special Report 1-SR-86-005 RADIATION MONITORING UNIT NOT RESTORED WITHIN 72 HOURS Docket No. STN 50-528 License No. NPF-41 This special report is required by Palo Verde Unit 1 Technical Specification Table 3.3-13, Action 42-b and Technical Specification 6.9.2.
At 1442, on January 22, 1986, Palo Verde Unit 1 was in Mode 1 at 100 percent reactor power, when the Condensor Evacuation System High Range Monitor (RU-142) was inoperable for more than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
This monitor was declared inoperable as a result of the Condensor Evacuation Low Range Monitor (RU-141) being declared inoperable due to spurious indication of high radiation.
This was verified by sampling to be invalid.
The design of the system is such that if the Low Range Monitor is inoperable, then the High Range Monitor is also inoperable.
RU-142 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-141.
Operations Engineering is continuing an investigation as to the cause of the spurious radiation signal increases.