ML19323B951
| ML19323B951 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/18/1979 |
| From: | Bosnak R Office of Nuclear Reactor Regulation |
| To: | Hanauer S NRC - TMI-2 UNRESOLVED SAFETY ISSUES TASK FORCE |
| Shared Package | |
| ML19323B948 | List: |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8005140449 | |
| Download: ML19323B951 (2) | |
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'o UNITED STATES y[')#q "k NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555
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JUN 181979
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NOTE T0:
S. H. Hanauer FROM:
R. J. Bosnak
SUBJECT:
FMEA 1.
The Mechanical Engineering Branch's Standard Review Plans do not require a formal failure modes and effects analysis. Components are designed with margin and are not postulated to fail. However, to achieve a degree j
of defense in depth, high energy piping is postulated to fail at specific locations and systems and structures must be protected against the mechanistic effects of such postulated pipe breaks by separation, barriers, or restraints. The environmental effects of such piping failures are also considered.
2 & 3.
The applicants perform the pipe break effects analysis which is reviewed by the Mechanical Engineering Branch, the Structural Engineering Branch and several of the Systems branches who also require that a single active failure be included in the evaluation.
p-p.J.Bosnak, Chief Mechanical Engineering Branch Division of Systems Safety cc:
J. Knight, DSS H. Brammer, DSS F. Cherny, DSS i
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A Reactor Systems Branch' Analysis Branch i
Core Performance Branch Containment Systems Branch I
wMichanical Engineering Branch j,
Materials Ensineering Branch Structural Engineering Branch Auxiliary Systems Branch i
Instrumentation and Control Systems Branch Power Systems Branch i
Please provide the following information to Sue Lynd (x27754) by COB Monday (6/18).
The Presidents TMI Commission wants to know:
1.
Where we require appl. to do FMEA(Failure Modes and Effects Analysis. )
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2.
What we want them to do with #1.
3.
What we do with #1.
4.
Where we (NRC) do FMEA.
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