ML20062N511

Forwards ML Ernst 800930 Memo Re Potential Problem of Negating Automatic Initiation of Containment Spray If Safety Injection Signal Is Reset.Info Necessary to Evaluate Reliability of ECCS & ESF Initiation Logic

ML20062N511
Person / Time
Site:	05000000, Point Beach
Issue date:	09/30/1980
From:	Schroeder F Office of Nuclear Reactor Regulation
To:	Bernero R NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
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References
FOIA-80-515, FOIA-80-555 NUDOCS 8203010220
Download: ML20062N511 (1)

Text

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SEP 3 015'M MEMORANDUM FOR: Robert Bernero, Director, Division of Systems and Reliability Research, RES FROM:

Frank Schroeder, Acting Director, Division of Safety Technology, NRR

SUBJECT:

SAFETY INJECTION SIGNAL RESET The enclosed memorandum describes our review of a potential problem at the Point Beach reactors of negating the automatic initiation of containment spray if the Safety Injection Signal (SIS) is reset. In other reactor plants there may be other safety functions that could be adversely affected by SIS reset.

We recomend that the IREP effort should, as one of its products, yield the information necessary to evaluate the reliability of ECCS and engineered safety feature (ESF) initiation logic, with the objective of identifying potential unreliabilities in design of either eoufpment alone or the combined man-machine interface. Particular attention should be pined on the effect of SIS reset on negating automatic initiation of ESF functions.

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rafi SIhrh/d$ff ng Director Division of Safety Technology Office of Nuclear Reactor Regulation

Enclosure:

Memonandum to Gus C.

Lainas from M. Ernst,

" Containment Spray Pump Actuation Logic" ces w/ enclosure:

D. Eisenhut.

F. Rowsome F. Schroeder R. Baer D. Ross T. Cox R. Vollmer S. Israel S. Hanauer J. T. Beard A. Thadant 8203010220 810804 PDR FOIA

• MADDEN 80-555 PDR