ML17300A867
| ML17300A867 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/18/1987 |
| From: | Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 192-00211-JGH-T, 192-211-JGH-T, 2-SR-87-013, 2-SR-87-13, NUDOCS 8705280087 | |
| Download: ML17300A867 (3) | |
Text
REGULATORY NFORMA'I ION D ISTR IBUTION S M
( R IDS
)
, ACCESS~ON NBR: 8705280087 DOC. DA'TE'r/05/18 NOTARIZED:
NO DOCVET FACIL:STN-50-529 Palo Verde Nuclear Station>
Unit 2> Arizona Pub Ii 050005~9 AUTH. NAME AUTHOR AFFILIATION HAYNEBp J. Q.
Arizona Nuclear Poucr Prospect
< formerly Arizona Public Serv RECIP. NAME RECIPIENT AFFILIA1l>>N Document Control 8< anch (Document Control Des')
SUBJECT:
Special Rept 2-SR-87-013: on 870':21> process monitor RU-5 inoperable For more than 72 h doe to Frequent failure alarms. Caused bg voltage spiKes on grounding sos. Mod initiated to replace moving fil+er assembly tu/Fi>ed filter.
DISTRIBUTION CODE IE22D COPIES RFCE<VEu: LTR Q ENCL Q SIZE:
TITLE: 50. 73 Licensee Event Repor+
<LFH) ~ Incident Rpt>
e+c.
NOTES: Standardized plant. M. Davis> N~R: 1Cg.
05000529 RECIPIENT ID CODE/NAME PD5 LA LICITRA>E COPIES REC IP IEN T LTTR ENCL ID CODE/NAME 1
1 PD5 PD 1
1 D VIS>M COP IE S LTTR &tTCL 1
5 INTERNAL: ACRS MICHELSON AEOD/DOA AEOD/DBP/TPAB NRR/DEBT/ADE NRR/DEBT/CEB NRR/DEBT/ICBB NRR/DEBT/MTB NRR/DEBT/RSB NRR/DLPG/HFB NRR/DOEA/EAB NRR/DREP/RPB NRR/PMAS/PTSB RES DEPY GI 1
1 1
1 1
1 1
1 1
2 1
1 f
ACRB MOELLER 5.
ALOD/DSP/ROAB D-nRO 0
NHR/DEBT/ADS t!>R/DEBT/ELB f
t!<R/DEBT/hEO 1
t!HR/DEBT/PSB 1
VnR/DEBT/SQB NHR/DLPG/GAB f
i<!HR/DREP/R*B 2
." R/3J'.IQB/ ILRB
~8=FM~
02 1
RCN5 FI LE 01
>p 2
2 1
5.
1 0
1 5.
1 1
1 1
l 1
1 1
5 1
1 EXTERNAL:
EQSG GROHp M LPDR NSIC HARRIS J NOTES' 5
H ST LOBBY WARD 1
1 KRC PDR 1
1 t!SIC NAYS> 0 1
1 1
1 1
1 1
TOTAL NUMBER OF COPIES REQUIRED:
LT/R O'NCL 42
Arizona Nuclear Power Project P.o. BOX 52034
~
PHOENIX, ARIZONA85072-2034 192-00211-JGH/TRB/JEM May 18, 1987 NRC Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Palo Verde Nuclear Generating Station Unit 2 Docket No.
STN 50-529 (License NPF-51)
Special Report 2-SR-87-013 File:
87-020-404
Dear Sirs:
Attached please find a Special Report 2-SR-87-013 prepared and submitted pursuant to Technical Specifications 3.3.3.1 and 6.9.2.
This report discusses a Radiation Monitoring Unit inoperable 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 tr y yours, J.
G.
Haynes Vice President Nuclear Production JGH/TRB/JEM/cld Attachment cc:
0.
M. DeMichele E. E.
Van Brunt, Jr.
J.
B. Martin R.
P.
Zimmerman R.
C. Sorenson E.
A. Licitra A. C. Gehr INPO Records Center (all w/a) 8705280087 870518 PDR ADOCK 05000529 8
PALO VERDE NUCLEAR GENERATING STATION Radiation Monitoring Unit Inoperable for Greater Than 72 Hours License No.
NPF-51 Docket No.
STN 50-529 Special Report No. 2-SR-87-013 This Special Report is being submitted pursuant to Technical Specification 3.3.3.1 ACTION 27 and Technical Specification 6.9.2 to report an event in which a process monitor, Containment Building Atmosphere RU-l, was inoperable for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
The 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> limit for operability was exceeded at approximately 0700 MST on April 24, 1987.
Pursuant to Technical Specifiction 3.3.3.1 ACTION 27 a moveable air monitor (RU-53) was placed in line to monitor the Containment Building atmosphere.
At approximately 0700 MST on April 21, 1987 Palo Verde Unit 2 was in Mode 1 (POlKR OPERATION) when RU-1 was declared inoperable due to frequent Filter Failure Alarms.
Troubleshooting and repair, in accordance with an approved work control document, resulted in the replacement of the filter mechanism and a transistor logic board.
However, this action did not alleviate the alarms.
Additional troubleshooting revealed voltage spikes on the grounding system.
The voltage spikes were traced to the sample pump motor starter circuit.
The motor starter circuit was replaced with a new circuit.
The new starter circuit reduced the voltage spikes but did not alleviate the filter alarms.
Troubleshooting is continuing in an effort to identify and correct the voltage spike problems.
Due to the continued intermittent filter failure alarms a modification to RU-1 will be implemented during the week of May 18, 1987.
This modification will replace the moving filter assembly with a fixed filter.
This is expected to eliminate the filter failure alarms.
It is expected that RU-1 should be returned to operability by June 1,
1987.
A schedule for implementation of this modification on other similar monitors will be developed.
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