ML19256E034

Notifies of Failure of Pump Which Circulates Water from Reactor Tank Through Demineralizer.Temporary Pump Installed & Original Pump Will Be Returned to Svc After Repairs

ML19256E034
Person / Time
Site:	05000148
Issue date:	10/16/1979
From:	Mesler R KANSAS, UNIV. OF, LAWRENCE, KS
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 7910250330
Download: ML19256E034 (1)

Text

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l%:3 u THE UNIVERSITY OF KANSAS LAWRENCE, KANSAS 66045

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% DEPARTMENT OF CHEMICAL AND PETROLEUM ENGINEERING 4G05 LEARNED 913-854 3922 October 16, 1979 Director nivision of Reactor Licensing

.aclear Regulatory Commission Washington, DC 20545 Re: R-78

Dear Sir:

I wi sh to report the f ai lure af ter 18 years of service of the pump which ci rcuiates water f rom the reactor tank through the deminerali: er.

This f ailure was responsible for an apparent violation of technical speci fication D-2 which requires that the pool water shal I be tested for resittivity before the f' rst reactor startup of the day. Wi th tt.e pump out of service meaningful measurements of the resistivity are not possible. The reactor was operated on Sept. 14, 20, and 21, 1979 without the measurements.

The reactor was operated on Sept. 12 prior to pump f ai f ure and the resi s tiv i ty was 2.3 megohm-cm. Af ter installation of a temporary pump the reactor was operated on Oct. 9 and the water measured 3.0 megohm-cm.

It i s a requi rement that tne measurements averaged over a month must not be below I megohm cm. Thus measurements that were possible do not inai cate poor water qua l ity.

When the orig i nal pump has been repai red it wil l be returned to service.

Very tru l y yours,

' _qa.d 'k,s r ,

RusseiI B. Mes I e r Professor RS.1: jw 1

1211 123 7910250 '