ML19262C090

LER 80-001/01T-0:on 800108,while Operating Plant at Approx 1.5% of Rated Power,Leak Discovered on Helium Circulator Static Seal Internal 1B to Circulator.Cause Unknown.Reactor Shut Down & Circulator Replacement Begun

ML19262C090
Person / Time
Site:	Fort Saint Vrain
Issue date:	01/22/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19262C089	List: ML19262C088 ML19262C090
References
LER-80-001-01T, LER-80-1-1T, NUDOCS 8001280282
Download: ML19262C090 (2)

Text

NRC FORY 360 U. S. NUCLEAR REGULATORY COMMISSION (1.YH ^

LICENSEE EVENT REPORT (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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REPORT DATE 80 7 60 61 DOCKET NUMBER EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h ITTT1 i On January 8,1980, while operating the plant at approximately 1.5% of rated power, itl o a I was determined that a leak existed on the 1B helium circulator static seal internal tol o .

Ithe circulator. The reactor was shutdown and circulator replacement started. There I o s l was no affect on public health or safety. This is reportable per Fort St. Vrain Tech-l o 6 nical Specification AC 7.5.2(a)3. A similar report was A0 -13. l 0 7 l l o a l 80 7 8 9

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i o lThe cause of the static seal malfunction is undetermined at this time. Th e Fo rt S t . I g l Vrain helium circulator was built by General Atomic Company. An analysis o f the mal- 1 1 7 l function will be submitted when available. l i a l I i 4 I 7 8 9 80 C *

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JANUARY 9, 1980 MR. KARL V. SEYFRIT REGION IV, REGULATORY OPERATIONS NUCLEAR REGULATORY COMMISSION 611 RYAN PLAZA DRIVE, SUITE 1000 ARLINGTON, TEXAS 76012 ON TUESDAY, JANUARY 8,1980, WHILE OPERATING THE PLANT AT APPROXIMATELY 1.5% OF RATED POWER, IT WAS DETERMINED THAT A T.,EAK EXISTS ON THE IB HELIUM CIRCULATOR STATIC SEAL ACTUATING MECHANISM WHICH CAUSES CONTINU0t1S BLEED-OFF OF THE SEAL PRP3SURIZING SYSTEM. THIS LEAK IS INTERNAL TO THE CIRCULATOR. AN INVESTIGATION IS IN PROCESS TO IDENTIFf THE CAUSE.

THIS EVENT IS REPORTABLE PER FORT ST. VRAIN TECHNICAL SPECIFICATION 7.5.2(a? 3.

PLEASE CONFIRM RECEIPT OF THIS TRANSMITTAL BY CALL BACK TO J. W. GAHM AT (303) 785-6300.

J. W. GAHM NUCLEAR GENERATING STATION FORT ST. VRAIN PUBLIC SERVICE COMPANY OF COLORADO 550 FIFTEENTH STREET, DENVER, COLORADO 80202 1816 091