ML20235F082

Requests Info Re Operating Experience for HPCI Sys of Operating BWR Plants,Including Number of Times Necessary to Remove Sys from Svc & Total Number of Days HPCI Sys Has Been out-of-svc

ML20235F082
Person / Time
Site:	Monticello, 05000000
Issue date:	08/09/1972
From:	Morris P US ATOMIC ENERGY COMMISSION (AEC)
To:	Dienhart A NORTHERN STATES POWER CO.
Shared Package
ML20235B311	List: IA-87-111, Submits Rept on Plant,As Discussed in ACRS 150th Meeting on 721012-14.Listed Items Can Be Resolved During Const & Facility Can Be Constructed W/Reasonable Assurance for Operation W/O Undue Risk to Public Safety IR 05000254/1972009 IR 05000358/1972003 IR 05000358/1973001 IR 05000358/1973002 IR 05000358/1973003 IR 05000358/1973005 IR 05000358/1973006 IR 05000358/1973007 IR 05000358/1974001 IR 05000358/1974002 IR 05000358/1974003 IR 05000358/1975004 ML20235B308 ML20235B364 ML20235B401 ML20235B405 ML20235B424 ML20235B456 ML20235B461 ML20235B465 ML20235B477 ML20235B488 ML20235B507 ML20235B552 ML20235B582 ML20235B585 ML20235B588 ML20235B605 ML20235B618 ML20235B623 ML20235B649 ML20235B656 ML20235B662 ML20235B670 ML20235B679 ML20235B683 ML20235B687 ML20235B702 ML20235B708 ML20235B713 ML20235B714 ML20235B718 ML20235B720 ML20235B730 ML20235B734 ML20235B748 ML20235B754 ML20235B762 ML20235B764 ... further results
References
FOIA-87-111 NUDOCS 8709280403
Download: ML20235F082 (2)

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'AUG 91972

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Mr. A. V. Dienhart V. P. Engineering 414 'ficollct Ave.

'Minncopolis, Minnesota 55401 Door Mr. Dionhart This is to request operating experience information recording the IliEh Pressure Coolant Injection (IIPCI) systems of operating EG plants. We rtre particularly interested in the availability and reliability of the UICI syste:n at the Monticello nuclear unit following completion of toctins of the system durin$ the startup test programs and request that you provide the following information:

1 1.

The number of times that it has' been necessary to remove the HPCI l' -

oyaton from service.

2.

The total number of days that the HPCI system has been out of service.

During testing)of Ole IIPCI system, the number 3

system has, (a failed to function in accordance with design. For(b picose dcocribe the malfunction and the ciretristances involved. In those instances where incident or unusual occurrenco reports have previously been submitted to the AEC, the description may be incorporated by reference to these reports.

4.

During rme+or oneration the number of times the 11PCI system has received a signal to operato, (c) when the HPCI system was in service, and (b) when the HPCI system was removed from service and incapable of operation.

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5 D:trinc reactor operation, the number of times the HPCI system received a cicanl to operate and failed to function in accordance with design. Picane provide a description of any malfunction and the circumstances under which they occurred.

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b. 'i In those instances where incident or unusual occurrenco reports have previously been submitted to the AW, the description may

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be ince.yend,ed by reference to these reports.

,j We' would appreciste your response to these questions within 15 days

~i, of receipt of.this letter. If this is.'not fossible, please let us know.

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.'l Sincerely,

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Peter A. Morris, Director Office'of Operations Evaluation.

Directorate of Regulatory Operations bcci A. Giambusso j

J. Hendrie

'l D. J. Skovholt R.-8. Boyd R..H. Engelken i 1 i s'

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