ML20128D954

Advises of Problem of HPCI & RCIC Isolation Capability for Small Breaks & or Large Leaks in Sys Piping

ML20128D954
Person / Time
Site:	Monticello, Vermont Yankee
Issue date:	11/14/1969
From:	Boyd R US ATOMIC ENERGY COMMISSION (AEC)
To:	Muller D US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 9212070432
Download: ML20128D954 (1)

Text

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h4 63 November 14, 1969

[h NOTE To DAN HULLER HONTICELIA PLANT - RPCI AND RCIC ISOLATION I discussed with Dr. Morris the problem of the HFCI and RCIC isola-tion capability for small breaks and/or large leaks in the system piping for the Monticolto (and Vermont Yankee) plant. We agreed that it is appropriate to tell NSF that the design details of these systems do not show that they have sufficient capability to detect such breaks / leakage and initiate required isolation of the appropriata lines. You should tell NSF that they will need to be able to demonstrate that these systems have adequate isolation capability with the present design or present information on changes that could be made so that failures in these lines could be detected and linos isolated as required.

Originalsigud by Roger 8. Boyd RoFer cca P. A. Morris D. B. Vaasa11o Docket Files

.9212070432 691114 PDR ADOCK 05000263 A PDR omu> .... . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . .

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