ML20236D253
| ML20236D253 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 10/21/1987 |
| From: | Mcneil S Office of Nuclear Reactor Regulation |
| To: | Tiernan J BALTIMORE GAS & ELECTRIC CO. |
| Shared Package | |
| ML20236D256 | List: |
| References | |
| TAC-64985, TAC-64986, NUDOCS 8710280091 | |
| Download: ML20236D253 (1) | |
Text
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Docket 'No'.
50-317.-
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CVogan 0GC Mr..J.A. Tiernan SMcNeil Vice President-Nuclear Energy LTripp Baltimore Gas and Electric Company P.O. Box 1475 Baltimore, Maryland' 21203
Dear Mr. Tiernan:
SUBJECT:
SAFETY EVALUATION OF TOPICAL REPORT CEN-348(B)-P, " EXTENDED
' STATISTICAL COMBINATION OF UNCERTAINTIES" (TACS 64985 & 64986)
We have completed our review of your letter dated March 17, 1987 which
-submitted the Combustion Engineering (C-E) Topical Report CEN-348(B)-P
" Extended Statistical Combination of Uncertainties," (ESCU) for Commission review and approval. This report provided a methodology for statistically
-combining the uncertainties involved in the departure from nucleate boiling related analog protection and. monitoring system setpoints.
The Commission finds that the use of this ESCU methodology is acceptable for C-E 14x14 fuel assemblies at Calvert Cliffs Units 1 and 2.
Enclosed herewith is our. Safety Evaluation.
Sincerely, l
l Scott Alexander McNeil, Project Manager Project Directorate I-1 Division of Reactor Projects, I/II l
Enclosuer:
l As stated I
cc: See next page o
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PDI-1 PDI-1 CVogan SMcnei M RCapra 10/p/87 10/2l /87 10/81/87 6710200093 gygog, DR ADOCK 05000317 PDR
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