ML20214P876

Special Rept 2-SR-86-036:on 861031,containment Bldg Atmosphere Monitor RU-1 Declared Inoperable Due to Cracked Drive Belt on Monitor Pump.Caused by Normal Component Aging. Belt Replaced

ML20214P876
Person / Time
Site:	Palo Verde
Issue date:	11/19/1986
From:	Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
2-SR-86-036, 2-SR-86-36, ANPP-00118-JGH, ANPP-118-JGH, NUDOCS 8612040407
Download: ML20214P876 (3)

Text

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,0 ECEIVE9 o .. 1: r . :i Arizona Nuclear Power Project P.O. BOX 52034

• PHOENIX, ARIZONA 85072-2034 l,0g ,

ad D og ANPP-00118-JGH/TDS/ ESP-96.03 November 19, 1986 t;EGIDH t'l;;;

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-86-036 File: 86-020-404

Dear Mr. Martin:

Attached please find a Special Report 2-SR-86-036 prepared and submitted pursuant to Technical Specifications 3.3.6 and 6.9.2. This report discusses a radiation monitoring unit not restored to operable within 72. hours. ,

If you have any questions, please contact Tom Bradish, Compliance Supervisor at (602) 932-5300, Ext. 6936.

Very truly yours, QN2 J. G. Haynes Vice President Nuclear Production JGil/TDS/ ESP /cid 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 INPO Records Center

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' Mr. John B. Martin :

- > Special = Report 2-SR-86-036 -

ANPP-00118/JGH/TDS/ ESP- 96.03 Page 2 1

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.0. JJ Zeringue.

J. M.' Allen R.~ E. Younger R. J. Adney:

R. lE. Gouge .

M. L. Clyde

14. E..Ide D. N. Stover -(NSG)'

J. R. LoCicero (ISEG)

M. K.;Hartsig.

D. R. Canady UIES Coordinator B..F. Asher- (Training)

PRO File-2-86-0157 Responsible; Departments (required review):

Operation's Engineering-(T. Phillips)

Operations Engineering (G. Voboril)

Operations Engineering (L. Henson)

Radiation Protection Chemistry Manager (L. Brown)

Radiological Services Manager.(G. Perkins) r-t'

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- :PALO VERDE NUCLEAR GENERATING STATION.

.Special Report 2-SR-86-036..

- RADIATION MONI'IORING UNIT NOT RESTORED WITHIN 72 H0bRS-Docket No. .STN 50-529' License No. ~NPF-51

'This special, report is required by.Palo Verde Unit 2 Technical Specification Table 3.3-6, Action-27.

U ;At 14'00 on October'31,.1986, Palo' Verde Unit 2 was in. Mode 1,(POWER OPERATION) at 100 percent reactor power, when_the Containment Building Atmosphere-Monitor (RU-1) had been -inoperable for more- than . 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The. monitor,iwhich samples radioactive.

gaseous effluents in the. containment building was initially ' declared inoperable on

' October 28, 1986.

~

. As~ required by' Technical-Specification Table 3.3-6, Action 27, the movable' a'i r monitor

, was placed in service. Since this monitor covers the same range as RU-1 and showed no abnormal radiation levels -during -this' time, no threat to the health and safety

of-the public. existed.

During the quarterly preventative maintenance work on RU-1, a cracked 'dri0e belt on the monitor. pump was detected ~. .As a prudent action,.RU-l'was_ declared inoperable

- to offeet ' replacement- of the belt '.rather then wait; for a failure . to occur. A work order.was issued and a qualified belt was obtained from the vendor for replacement.

--The monitor was returned to operable status at 1431.on October 31, 1986,-31 minutes af ter the:72 hour period was exceeded.

An engineering analysis has attributed the cracking of the belt to normal component -

' aging. Since the regularly scheduled preventive -maintenance detected the problem prior to failure, no changes to the schedule are currently planned.