ML20217J277
| ML20217J277 | |
| Person / Time | |
|---|---|
| Issue date: | 09/22/1999 |
| From: | Bahadur S NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Wermiel J NRC (Affiliation Not Assigned) |
| Shared Package | |
| ML20217J283 | List: |
| References | |
| REF-GTECI-023, REF-GTECI-NI, TASK-023, TASK-OR NUDOCS 9910250058 | |
| Download: ML20217J277 (1) | |
Text
PT) Q M Cp sw n n,vn, a
MEMORANDUM TO: Jared S. Wermlel, Chief J
Reactor Systems Branch Office of Nuclear Reactor Regulation FROM:
Sher Bahadur, Chief Engineering Research Applications Branch j
Division of Engineering Technology Office of Nuclear Regulatory Research
SUBJECT:
RCP SEAL FAILU'4ES MODELING REPORT
)
The subject report," Guidance Document for Modeling of RCP Seal Failures," BNL Tec nical }
Report W6211-08/99, is being submitted for your use. This document describes the "Best p 1
Estimate Failure Model" previously used by NRC for modeling reactor coolant pump (RCP) s6,a!
failures under loss of seal cooling (LOSC) conditions. This document is based on numerousl studies and reports that have been performed by and for NRC ae part of GSI-23, as well as,'
industry documents.
t The report provides a description of the various RCP seal designs, the seal failure mechanisms, j
and associated failure probabilities and leakage rates for a LOSC event or condition. An acceptable approach 'or modeling the seal f ailures and for incorporating the results into a PRA is provided. This general approach is generic and can be applied to any design of RCP seal for which the detailed information is available.
The report also provides an in-depth, detailed example of the application of this method to the Westinghouse RCP seal. This example is based on the "Best Estimate Failure Model" derived from the GSI-23 research and is necessarily somewhat complicated.
This report is non-proprietary, having been reviewed and approved by Westinghouse as containing no proprietary information. The document has now been placed in the NRC public j
document room.
If you have any questions, please contact Jerry Jackson (415-6656) of my staff.
)
cc: C. Jackson g
]
k
Attachment:
As stated Dictribution without att: JCraj, ERAB r/f, PDR (with att.)
DOCUMENT NAME: g:\\jerryjackson\\rcprpt i a receive e copy of this document, ind,cate in the box: "C" = Copy without attachment / enclosure "E" = Copy with attachment! enclosure
- N"- Noccpy 0FFICE ERAB/RES 0
ERAB/RES
,j NAME JJackson Q.f.C.
SBahadur N DATE 9/&l/99 "
9/(),\\/99 0FFICIAL RECORD COPY C:M056 9910250058 990922 PDR OTECI CNIO23 PDR