ML19340B150

Requests NRC View on Whether BWR 5/6 Sys Has Adequate Reliability for Source of High Pressure Water Necessary Under ATWS Conditions.Acrs Did Not Imply That BWR 5/6 Sys Had Problems Similar to Early BWRs

ML19340B150
Person / Time
Issue date:	10/14/1980
From:	Fraley R Advisory Committee on Reactor Safeguards
To:	Dircks W NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO)
References
ACRS-R-0901, ACRS-R-901, NUDOCS 8010210512
Download: ML19340B150 (1)

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October 14,-1980-l rEMORANDUM FOR:.Willian J. Dirc ~ Exequtive Director for Operations nIngy FROM:

R. F. Fral Tid}Tector

SUBJECT:

ACRS, COMMENTS ON ATWS

_,c.,c C'Y'I In it's April 16, 1980 letter on ATWS, the ACRS commented that "For new

'GE plants and those in early stages'of construction, it is recommended that -increased reliability be incorporated in systems which can deliver water to the vessel under the operating pressure expected after an ATWS".

This recommendation was based primarily on the Committee's interpretation I

of operating. experience with early BWRs and was not meant to imply that-the BWR S/6 system necessarily had similar problems.

l It is the Committee's understanding that the Staff's concerns about high pressure injection system reliability were also based on performance of t

earlier.BWR systems.

Please provide us the Staff's view on whether the BWR 5/6 system is judged to have the reliability appropriate to a source of high pressure water l

which might be needed under ATWS conditions.

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