ML17303A672

Special Rept 2-SR-87-026:on 871007,radiation Monitor Inoperable for Greater than 72 H.Caused by Noises in Air pump.RU-1 Declared Operable After Satisfactory Installation & Testing of Replacement Air Pump

ML17303A672
Person / Time
Site:	Palo Verde
Issue date:	11/03/1987
From:	Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
192-00300-JGH-T, 192-300-JGH-T, 2-SR-87-026, 2-SR-87-26, NUDOCS 8711100283
Download: ML17303A672 (3)

Text

sr'CCESSION NBR: 8711100283 DOC. DATE: 87/11/03 NOTARIZED: NO DOCKET FACIL: STN-50-529 Palo Verde Nuclear Stations Unit 2i Arizona Publi 05000529 AUTH. NAME AUTHOR AFFILIATION HAYNES'. G. Arizona Nuclear PoUJer ProJect (formerly Arizona Public Serv REC IP. NAME'ECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Special Rept 2-SR-87-026: on 871004'adiation monitor inoperable for greater than 72 h. Caused bg noises in air pump. RU-1 declared operable after satisfactory installation h testing of replacement air pump.

DISTRIBUTION CODE: IE22D COPIES RECEIVED: LTR ( ENCL SIZE:

TITLE: 50. 73 Licensee Event Report (LER)i Incident Rpti etc.

NOTES: Standardized plant. 05000529 RECIPIENT COPIES REC IP IENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 1 PD5 PD 1 1 LICITRAiE 1 1 DAVIS' 1 1 INTERNAL: ACRS MICHELSON 1 1 ACRS MOELLER 2 2 AEOD/DOA 1 1 AEOD/DSP/NAS 1 1 AEOD/DSP/ROAB 2 2 AEOD/DSP/TPAB 1 1 ARM/DCTS/DAB 1 DEDRO 1 NRR/DEST/ADS 0 NRR/DEST/CEB 1 NRR/DEST/ELB 1 1 NRR/DEST/ICSB 1 1 NRR/DEST/MEB 1 1 NRR/DEST/MTB 1 1 NRR/DEBT/PSB 1 1 NRR/DEST/RSB 1 1 NRR/DEST/SGB 1 1 NRR/DLPG/HFB 1 1 NRR/DLPG/GAB 1 1 NRR/DOEA/E*B 1 1 NRR/DREP/RAB 1 1 NRR/DREP/RPB 2 2 NR~DR=E~S I B 1 "1 NRR/PMAS/ ILRB 1 REG F & 02 1 RES DEPY GI 1 1 RES TELFORDi J 1 1 RES/DE/EIB 1 1 RGN5 FILE 01 1 EXTERNAL: EQSQ QROHi M 5 5 H ST LOBBY WARD 1 1 LPDR 1 1 NRC PDR 1 1 NSIC HARRIS> J 1 NSIC MAYST G 1 1 NOTES:

TOTAL NUMBER OF COPIES REQUIRED'TTR 47 ENCL 46

Arizona Nuclear Power Project P.O. 8OX 52034 ~ PHOENIX. ARIZONA&5072-2034 192-00300-JGH-TRB/KCP November 3, 1987 U.S. Nuclear Regulatory Commission NRC Document Control Desk Washington, D.C. 20555

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Docket No. STN 50-529 (License NPF-51)

Special Report 2-SR-87-026 File: 87-020-404 Attached please find Special Report 2-SR-87-026 prepared and submitted pursuant to Technical Specifications 3.3.3.1 ACTION 27 (3). This report discusses a radiation monitor that 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 />.

If you have any questions, please contact T. R. Bradish, Compliance Supervisor at (602) 393-3531.

Very truly yours, H~~.~

J. G. Haynes Vice President Nuclear Production JGH/TRB/KCP/cld Attachment cc: 0. M. DeMichele (all w/a)

E. E. Van Brunt, Jr.

J. B. Martin J. R. Ball E. A. Licitra A. C. Gehr INPO Records Center 8711100283 871103 PDR ADOCK 05000529 8 PDR

t t PALO VERDE NUCLEAR GENERATING STATION RADIATION MONITORING UNIT INOPERABLE FOR GREATER THAN 72 HOURS License No. NPF-51 Docket No. 50-529 Special Report No. 2-SR-87-026 This Special Report is being submitted in accordance with Technical Specifications (T.S.) 3.3.3.1 ACTION 27 (3) and 6.9.2 to report an event in which a radiation monitor 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 inoperability was exceeded at approximately 0730 MST, October 7, 1987.

At approximately 0730 MST on October 4, 1987, Palo Verde Unit 2 was in Mode 1 (POWER OPERATION) at 100 percent power when the Containment Building Atmosphere Radiation Monitor (RU-1) was declared inoperable due to abnormal noises in the air pump. Radiation Monitor RU-1 continuously monitors the Containment Atmosphere for particulate, iodine and gaseous activity. This monitor can also be used as a method of reactor coolant system leak detection in accordance with the requirements of T.S. 3.4.5.1. T.S. 3.3.3.1 requires that the monitor be operable in Modes 1, 2, 3 and 4. If the monitor is inoperable it shall be 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 />, or a moveable air monitor shall be placed in-line. Additionally, T.S. 3.4.5.1 requires that at least 2 out of 3 reactor coolant leak detection systems be operable.

Compensatory measures were established in accordance with the applicable requirements of T.S. 3.3.3.1 and 3.4.5.1 as noted above by installing a moveable air monitor in-line prior to removing RU-1 from service. The air pump for RU-1 was then removed and replaced with a qualified pump from a non tech. spec.

monitor (RU-34). The root cause of failure for the defective pump is currently under investigation by Operations Engineering.

At approximately 1646 MST, October 7, 1987, RU-1 was declared operable after satisfactory installation and testing of the replacement air pump. The duration of this event was approximately 81 hours9.375e-4 days <br />0.0225 hours <br />1.339286e-4 weeks <br />3.08205e-5 months <br />.