ML19305D410
| ML19305D410 | |
| Person / Time | |
|---|---|
| Issue date: | 03/11/1980 |
| From: | Plesset M Advisory Committee on Reactor Safeguards |
| To: | Dircks W NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
| References | |
| ACRS-R-0866, ACRS-R-866, NUDOCS 8004150046 | |
| Download: ML19305D410 (1) | |
Text
--
- y ~~ug k ggk C[6f UNITED STATES j
o,,
f NUCLEAR REGULATORY COMMISSION n
B
.)
AOviSORY COMMITTEE ON REACTOR SAFEOUARDS g
f h
l o
wAsMNGToN, D. C. 20666 g
March 11,1980 l
l I
i r
Mr. William J. Dircks, Acting f
l Executive Director for Operations U. S. Nuclear Regulatory Commission Washington, D. C. 20555
Dear Mr. Dircks:
Several NPOL plant test prograns are currently under consideration with regard to low power tests thich are designed to provide operational training and to obtain information regarding plant performance during emergency conditions.
Some of the conditions which could usefully be included are verification of core cooling capability when natural circulation has been impeded or upset by one or more factors, including gas binding. mis would make necessary I
the use of the " feed-bleed" or " reflux-condensation" processes.
Rese t
processes have not been proven, and safety grade equipnent is not in place to provide the " bleed" part of the process.
It would be prudent to investigate these processes smder controlled condi-tions if we intend to depend on them during energency conditions. % this i
i end, the ACRS reccnmends that consideration should be given, if at all possible, to some verification testing of decay heat removal tmder upset conditions during low power testing prograns.
Sincerely,
$^
Milton S. Plesset Olairman l
y
.