ML20196F973
| ML20196F973 | |
| Person / Time | |
|---|---|
| Issue date: | 08/18/1977 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Baer R, Butler W, Grimes B Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20196F442 | List:
|
| References | |
| FOIA-87-854, TASK-06-10, TASK-06-10.A, TASK-06-10.B, TASK-6-10, TASK-6-10.A, TASK-6-10.B, TASK-RR NUDOCS 8803040286 | |
| Download: ML20196F973 (2) | |
Text
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1 August 18, 1977 i
MEMORANDUM FOR: Robert L. Baer, Chief, Reactor Safety Branch j Walter R. Butler, Chief. Plant Systems Branch I Brian K. Grimes, Chief. Environmental Evaluation Branch Lawrence C. Shao, Chief. Engineering Branch FROM: Dennis L. Zienann, Group Leader, Systematic Evaluation
! Program
SUBJECT:
SEP TOPIC CULLING - LACK OF SAFETY SIGNIFICANCE l
My August 17, 1977 memo to you on the above subject transmitted i
! Topics of Lesser Safety Significance with the basis for that classification, f
The enclosure inadvertently omitted the attached topics. Please include these in your review. o.. -inal Signed by:i' L-..nis L. Ziemann, Dennis L. Ziemann, Group leader Systematic Evaluation Program Division of Operating Reactors
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8803040286 880229 PDR FOIA CONNOR87-854 PDR
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, ENCLOSURE TOPICS OF LESSER SAFETY SIGNIFICANCE VI-10 Fission Products Removal Systems -
A. Iodine Removal by Sprays B. ESF Charcoal Filter System- -
C. Secondary Containment These topics have been deleted from the Comprehensive Topic List on the basis of lesser safety significance.
The effects of reduced credit for these systems will not be critical if the LOCA analyses are performed using realistic assumptions. This is a result of the multiple conservatisms included in the LOCA calculations and because the credit given for some of these systems is considerably lower than realistically may be expected.
Although a detailed independent review of these systems will not be 1 perfortred, they will be considered in the analysis of the radiological '
consequences of a LOCA (Topic XV-19). If the results of this analysis are unacceptably high (i.e., doses in excess of the 10 CFR Part 100 guidelines) it may then be concluded that the design of these systems need'to be reviewed and possibly upgraded to allow credit for these systems in reducing calculated doses.
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