ML19260C438
| ML19260C438 | |
| Person / Time | |
|---|---|
| Issue date: | 07/02/1979 |
| From: | Tan C Office of Nuclear Reactor Regulation |
| To: | Burger C NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| References | |
| REF-GTECI-A-01, REF-GTECI-PI NUDOCS 8001030345 | |
| Download: ML19260C438 (1) | |
Text
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JUL 2 1979 MEMORANDUM FOR: Charles Burger Structural Engineering Research Branch Reactor Safety Research THRU:
Franz P. Schauer, Chief Structural Engineering Branc Division of Systems Safety FROM:
Chen P. Tan Structural Engineering Branch Division of Systems Safety
SUBJECT:
TASK ACTION PLAN A-1, REVIEW EG & G REPORT N0. RE-A-79-013 "AN ANALYTICAL PROCEDURE FOR PERFORMING STRUCTURAL ANALYSIS OF NUCLEAR PIPING SYSTEMS SUBJECTED TO FLUID TRANSIENTS".
Per your request, I have reviewed the subject report. The report described the analytical procedure necessary to carry out the structural analysis of a pipe system subjected to a fluid transient, and presented illustrative examples of computation for two fluid transients.
Theanalytical procedure as described in the report appears to be very similar to those used by the nuclear industry for piping analysis and accepted by NRC.
The structural analysis is accomplished through the use of NUPIPE-II computer program which appears to be proprietary. This computer program is briefly described in the appendix of the report, but it is not mentioned how the program is validated.
It is noted that the two fluid transients are classified as faulted conditions.
I have reservations about such a classification. With exception of the above concerns I recormiend the acceptance of the report for its general analytical procedure and approach only.
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cs~v C. P. Tan Structural Engineering Branch Division of Systems Safety S. Hanauer F. Cherny M. Aycock R. Colmar R. Denise R. Giardina W. Butler J. Zwolinski D, Jeng 8001030 de 1700 296
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JUN 191979 MEMORANDUM FOR: Charles Burger, Research Program Manager, Structural Engineering Research Branch, RSR THRU:
Walter R. Butler, Chicf. Containment Systems Branch, DSS FROM:
John A. Zwolinski, Containment Systems Branch, DSS
SUBJECT:
TASK ACTION PLAN A-1, REVIEW EG&G REPORT RE-A-78-261, CODE ASSESSMENT AND APPLICATIONS PROGRAM, AN ANALYSIS TOOL FOR PREDICTING TRANSIENT HYDRODYNAMICS IN NUCLEAR PIPING SYSTEMS CONTAINING SWING CHECK VALVES Per your request, I have reviewed the subject report.
The author reported that an analysis tool had been evaluated in terms of its capability for predicting a fluid transient resulting from check valve action following a rupture in a piping system. As part of the initiating condition, it was assumed that the piping system was undergoing a pipe rupture.
In general, the work appeared technically accurate and beneficial, assuming the dynamic check valve model was incorporated correctly, into RELAP-5.
The author presented a test problem with results which appeared logical to this reviewer.
Based upon nty understanding of the work, I recomend it be published.
I do question, however, whether it is appropriate to incorporate in an Appendix the report entitled, "RELAP 5 Progress Sumary Pilot Code Hydro-dynamic Model and Numerical Scheme," published January 1978. While RELAP-5 was the primary code utilized, it was not developed in conjunction with the reported work. A simple reference to the RELAP-5 report may be sufficient.
John. Zwolinski Conta ment Systems Branch Division of Systems Safety cc:
S. Hanauer M. Aycock R. Denise W. Butler F. Cherny R. Colmar R. Giardina C. Tan J. Zwolinski 1700 297