ML20058K798

AO 75-3:on 750128,both Unit 2 Safety Injection Pumps Incapable of Starting on Automatic SI Signal from Approx 0900 to 100 H

ML20058K798
Person / Time
Site:	Monticello
Issue date:	01/29/1975
From:	Clarity R NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
75-3, NUDOCS 9102140414
Download: ML20058K798 (2)

Text

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. - + . - a REPORT OF ABNOR'LAL GCCURRE"CE 20. 75-3 On January 28, 1975, both Unit 2 Safety Injection Punps vere incapable of starting on :n autcratic SI cign:1 from appronizately 03C0 to 1100. T!.e unit was operating at about 73% power thrcughout this time period.

Number 22 SI pump was racked out while a leak in the oil cooler was being repairec. humrer 21 SI prep vae tested for operability prior to r:chinr '

out .sunber 22. However, frc= 0900 to 1100, Train A of the Safeguards Logic was under test as per conthly Surveillance Test STP-1032A, chich would have pr2 vented a Train A Saf ety Ejection actuctien. l Throughout this time, the Centrol Roo: cperator rho was particiratine, '

in tnis surveillance test could have initiated a Train A Safety Injection by sinply pushing the test relay reset butten en the control ranel. The operator was aware of the f act.

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