ML20059E194
| ML20059E194 | |
| Person / Time | |
|---|---|
| Issue date: | 03/04/1992 |
| From: | Dhir V Advisory Committee on Reactor Safeguards |
| To: | Catton I Advisory Committee on Reactor Safeguards |
| References | |
| ACRS-CT-2010, NUDOCS 9311030122 | |
| Download: ML20059E194 (4) | |
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UNITED STATES b
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NUCLEAR REGULATORY COMMISSION
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ADVISORY COMMITTEE ON REACTOR SAFEGUARDS o
g WASHINGTON, D. C. 20555
,o March 4, 1992 MEMORANDUM FOR:
I.
- Catton, Chairman, Thermal Hydraulic Phenomena Subcommittee FROM:
"V.J." Dhir, ACRS Consultant
SUBJECT:
COMMENTS CONCERNING THE NEED FOR INTEGRAL SYSTEM TESTING FOR THE WESTINGHOUSE AP600 -
THERMAL HYDRAULIC PHENOMENA SUBCOMMITTEE MEETING, MARCH 3, 1992 In response to your request, the following are my comments concerning the issues discussed during the subject Subcommittee meeting.
Need for an Intecral System Test Facility I am somewhat disappointed to note that neither Westinghouse not NRC have carried out detailed analyses to show why a full-height, full-pressure integral facility is needed.
However, I must state that I do share some of the concerns the NRR staff has expressed today with respect to the complexities introduced due to the existence of several different recirculation flow paths, the i
4 injection of nitrogen following accumulator injection, etc.
There is also a need for validation of the codes used by both W and the staff.
Use of ROSA-IV versus Construction of a New Test Facility i
My preference is that a new full-height, full-pressure facility be built and operated in the U.S.
The reasons for this recommendation are:
- 1. The ROSA facility will require substantial modification to properly simulate AP600.
This will impact both the schedule and costs of the experiments.
- 2. Use of a foreign facility will deprive American engineers and scientists of the opportunity of direct involvement.
- 3. A domestic facility will allow easy exchange of ideas, information, visits, etc.
- 4. Expertise will remain in the country.
Who Should Build the Facility C O ORIGINAI, A
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4 "V.J. Dhir Comments 2
March 3, 1992 Since the AP600 design is still changing, I do not believe that there is an urgency to performing full-height, full-pressure integral tests.
I believe such testing should be conducted on a tri-partner basis consisting of the NRC, DOE, and H.
Costs to each would be ~ $6-7M.
Westinchouse Position I thought that W would have conducted more elaborate analyses to support their points of argument.
I applaud their testing in support of separate effects phenomena.
However, I believe that they should have been equally aggressive in analysis of transient behavior.
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