ML20211R011
| ML20211R011 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/03/1986 |
| From: | Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 2-SR-86-037, 2-SR-86-37, ANPP-00121-JGH, ANPP-121-JGH, NUDOCS 8612220219 | |
| Download: ML20211R011 (3) | |
Text
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f REglgo Arizona Nuclear Power Project g g DEC - a p I: Ol P.O. BOX $2034 e PHOENIX, ARIZONA 85072-2034 i
ANPP-00121-JGil/TDShl@lf#i.Q3 December 3, 1986 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
Subject:
Palo Verde Nuclear Gcnerating Station Unit 2 Docket No. STN 50-529 (License NPF-51)
Special Report 2-SR-86-037 File:
86-020-404
Dear Mr. Martin:
Attached please find a Special Report 2-SR-86-037 prepared and submitted pursuant to Technical Specificatior.s 3.3.3.1 and 6.9.2.
This report discusses the inoperability of the Contali. ment Building Atmosphere Rediation Monitor for greater than 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 Tom Bradish, Compliance Supervisor at (602) 932-5300, Ext. 6936.
Very truly yours,
$ G mM--
y J. G. Ilaynes Vice President Nuclear Production JGil/TDS/JIIT/c1d Attachment cc:
O. M. DeMichele (all w/a)
E. E. Van Brunt, Jr.
R. P. Zimmerman R. C. Sorenson E. A. Licitra A. C. Gehr INPO Records Center 8612220219 861203 PDR ADOCK 05000529 S
PDR t '
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s-Mr. John.B.. Martin Special Report 2-SR-86-037
-ANPP-00121/JGH/TDS/JHT-96.03
-Page 2 bcc:
'Jr. R. Bynum (all w/a)
O. J..Zeringue
-J. M. Allen-R. E; Younger R. J. Adney R. E. Gouge M. L. Clyde W. E. Ide D. N. Stover (NSG)
J.-R.'LoCicero (ISEG)
M. K. Hartsig D. R. Canady LCTS Coordinator B. F. Asher (Training)
PRO. File 2-86-0159 Responsible. Departments (required review):
G. D. Perkins (Rad-Protection)
T..A. Phillips (Ops Eng)
G. K. Voboril (0ps Eng)
,~.
PALO VERDE NUCLEAR GENERATING STATION Special Report 2-SR-86-037 Docket No. STN 50-529 License No. NPF-51 At 2130 on November 4,1986, Palo Verde Unit 2 was at 100 percent reactor power, when the Containment Building Atmosphere Monitor (RU-1) was declared inoperabic because it was generating filter step alarms. A movable air monitor was placed in line to comply with Technical Specification Table 3.3-6 ACTION 23.
At 0818 on November 7, 1986, the gaseous channel of RU-1 was returned to service however the particulate channel remained inoperable pending completion of troubleshooting. Technical Specification 3.3.3.1 Table 3.3-6 ACTION 27 requires that a special report be submitted to the NRC pursuant to Specification 6.9.2 within 30 days af ter the number of operable channels is less than required by the minimum channels operable requirement for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. In order to comply with Technical Specification Table 3.3-6 ACTION 23 and 27 the movable air monitor was maintained in service.
RU-1 is used to detect Reactor Coolant System leakage. One of its functions is to measure particulate activity. The monitor accomplishes this by passing a sample of containment atmosphere through a filter paper. The paper is monitored for radioactive particulates that become entrapped in the fibers. The paper is moved at periodic preset intervals or steps.
If a complete step of the filter paper does not occur, a filter paper step alarm will be generated. This ensures that up to date samples of containment particulate activity are measured.
Troubleshooting was conducted on the RU-1 particulate channel. Troubleshooting efforts revealed that the cause of the filter step alarms was a loose capacitor. The capacitor 1 cads are attached at soldered joints. The connector was resoldered.
It is indeterminate whether the capacitor leads were improperly soldered by the manufacturer or were jarred loose during previous maintenance activities on this monitor. Since this condition has not occurred or been noted on other monitors which utilize similar connections, this is considered an isolated event. However, an Engineering Evaluation Request (EER) has been generated to evaluate this item to ensure there are no generic implications.
At 2155 on November 10, 1986, the applicable surveillance test was performed and the particulate channel was declared operable.
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