ML20106B297
| ML20106B297 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 05/08/1992 |
| From: | Lipinski W ARGONNE NATIONAL LABORATORY |
| To: | Alderman H Advisory Committee on Reactor Safeguards |
| References | |
| ACRS-CT-2021, NUDOCS 9210010105 | |
| Download: ML20106B297 (1) | |
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'ARGONNE NATIONAL LAllORATORY m com3:am 9700 South Caps Avenue, Argonne lilinois 60439 FAX: 604 25249?8 BM 9dM/9A May 8,1992 C EN.,E?
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Mr.11. Alderman, Staff Engineer g j 3 17)2 Advisory Comrnittee on Reactor Safeguards U.S. Nuclear Regulatory Commission 7.cn m -
Washington, D.C. 20555
Dear Mr. Alderman:
Subject:
ACRS 3 lnt SubcomMrLinlktilng nnJ1E AdvanenLUniling Water Reactor 3
Control Room DeslRDJ.Jav 4.19H General Electric concluded their presentation with the statement that " Reliable Software Needs No Additional Analog Backup," I do not agree with this conclusion.
General Electric has offered a commitmeat to deliver reliable software with negligible common mode failure probability, GE does not have an eroerience base to demonstrate that this commitment has been met in prior designs. Therefore,it %uld be prudent to include a carefully selected minimum set of hardwired instrumentation and controls in the main control room during a transition phase as nuclear power plant Qsigns progress from completely hardwired to completely computerized designs. After an appropriate experience base is developed and lessons are learned, future designs may progress to completely computerized systems.
Sine rely,
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Walter C. Lipinski Ph.D.
Reactor Engir cring Division WCL:kj cc:
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