ML17300A748
| ML17300A748 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/30/1987 |
| From: | Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 192-00176-JGH-T, 192-176-JGH-T, 2-SR-87-007, 2-SR-87-7, NUDOCS 8704200292 | |
| Download: ML17300A748 (6) | |
Text
REGULATOR NFORMATION DISTRIBUTION EM (R IDS) y ACCESSION NBR: 8704200292 DOC. DATi: 87/03/30 NOTARI 2 ED:
NO DOCKET 0 FAC IL:STN-50-529 Palo Verde Nuclear S+a+i one Unit 2i Arizona Pub li 05000529 AUTH. NAME AUTHOR AFFILIATION HAYNES, J. G.
Arizona Nuclear Power Prospect
( formerlg Arizona Public Serv REC IP. NAME REC IP IENT AFFILIATION MARTINiJ. B.
Region 5>
Office of Director
SUBJECT:
Special Rept 2-SR-87-007: on 870312i time limit For restoring channel of reac tor vessel uater level instrumentati on exceeded.
Cause of inoperability under investigation. Channel expected to be returned to svc a+ next refueling outage.
DISTRIBUTION CODE:
IE01D COPIES RECEIVED: LTR ENCL SIZE:
TITLE: General (50 Dkt)-Insp Rept/No+ice of Violation Response NOTES: Standardized plant. M. Davis. NRR: 1Cg.
05000529 REC IP IENT ID CODE/NAME PD5 LA LICITRA>E-INTERNAL: ACRS DEDRO NRR RQE> M. L NRR/DOEA DIR NRR/DREP/RPB NRR/PMA /ILRB FI:LW RGN5 FILE 01 EXTERNAL:
LPDR NSIC NOTES:
COPIES LTTR ENCL 1
0 1
2 2
2 1
1 1
2 2
1 1
1 1
1 1
1 1
1 1
REC IP I ENT ID CODE/NAME PDS PD D*VIS s M AEOD ENF LIEBERMAN NRR/ADT NRR/DREP/EPB NRR/DR IS DIR QGC/HDS1 RES SPEIS> T NRC PDR COP IES LTTR Er'C L 1
1 1
1 1
}
1 1
1 1
1 1
1 1
1 TOTAL NUMBER OF CQP IES REQUIRED:
LT)R 25 ENCL 24
l
Arizona Nuclear Power Project P.o. 8OX 52034
~
PHOENIX, ARI2ONA85072-2034 192-00176-JGH/TRB/ESP March 30, 1987 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 Generating Station Unit 2 Docket No.
STN 50-529 (License NPF-51)
Special Report 2-SR-87-007 File:
87-020-404
Dear Mr. Martin:
Attached please find a Special Report 2-SR-87-007 prepared and submitted pursuant to Technical Specifications 3.3.3.6 and 6.9.2.
This report discusses one channel of the Reactor Vessel Water Level System inoperable.
If you have any questions, please contact Tom Bradish, Compliance Supervisor at (602) 932-5300, Ext. 6936, Very truly yours, gg6uy~~
J.
G.
Haynes Vice President Nuclear Production JGH/TRB/ESP/cld Attachment cc:
0.
M. DeMichele (all w/a)
E. E.
Van Brunt, Jr.
R.
P.
Zimmerman R.
C. Sorenson E. A. Licitra
. A. C. Gehr INH) Records Center 8~0<200p9p DOCK 870330 8
0>000>p9 Pop f'<1
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PALO VERDE NUCLEAR GENERATING STATION UNIT 2 One Channel of the Reactor Vessel Water Level System Inoperable License No.
NPF-51 Docket No. 50-529 Special Report 2-SR-87-007 At 2252 on March 5,
- 1987, Palo Verde Unit 2 was in Mode 3 (HOT STANDBY) when Technical Specification 3.3.3.6 ACTION 31 was entered due to the inoperability of one channel of the Reactor Vessel Water Level Instrumentation.
ACTION 31 requires restoration of the inoperable channel within 7 days if repairs are feasible without shutting
- down, or submittal of a Special Report to the commission within 30 days following the event.
At 2252 on March 12,
- 1987, the time limit for restoring the channels to service was exceeded.
This report is being submitted to fulfillthe reporting requirement.
Each channel of the Reactor Vessel Level Indication.system utilizes eight (8) heated junction thermocouples (HJTC) to generate the signals for 8 indicated levels.
In order for each channel to be operable 4 of the 8 sensors must be functional.
Seven sensors in the "B" Train channel are inoperable which renders this channel of the Reactor Vessel Level Indication System inoperable.
Troubleshooting has been conducted,
- however, the root cause of the sensor malfunction could not be determined.
Further troubleshooting will be conducted during the first refueling outage when the sensors can be removed.
The channel is expected to be returned to service at the next 'scheduled refueling outage.
I