ML19323B872
| ML19323B872 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 02/16/1977 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Arlotto G NRC OFFICE OF STANDARDS DEVELOPMENT |
| Shared Package | |
| ML19323B873 | List: |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8005140370 | |
| Download: ML19323B872 (1) | |
Text
8 0 05140 370 m
- ~
s
[
Uf8TED STATES e *.o
'4 NUCLEAR REGULATORY COMT.*lsslON 3 %Q h
WASHINGTON, D. C. 20555 YYBO!
-.ra 1: E' g -c y MEMORAf1DUM FOR: Guy A. Arlotto, Director, Office of Str !ards Development FROM:
Robert L. Tedesco, Assistant Director for Plant Systems, DSS
SUBJECT:
COMMENTS AND BALLOT - P-466, CRITERIA FOR THE DESIGN OF SAFETY-RELATED SURVEILLANCE INSTRU-MENTATION (SRSI) IN NUCLEAR POWER GENERATING STATIONS Enclosed are a Negative ballot and comments on P-466, Draft 3, Criteria for the Design of SRSI in Nuclear Power Generating Stations. The major focus of the standard is the identifica-tion of the functional requirements which are not required for SRSI. Thus, the appearance is that this standard is an indistinct attempt to establish diluted criteria for SRSI and is directed solely towards the licensing process. Little consideration is given to improving the nuclear power plant safety and/cr operability.
Therefore, it is our opinion that the development of this standard is premature.
This need for specific criteria for the design of SRSI and other similar instrumentation systems, which have an important role in determining that nuclear plants are operated safely and reliably (but which are not part of the plant safety systems),
has been recognized for some time.
However, it is important that any standards developed for these systems provide positive, consistent and systematic criteria and guidelines. To achieve this end, it is'necessary that a base document defining the design base and identifying the criteria for these ' Class 2E" systems be developed before attempting to develop the require-ments for spr.cific applications of these systems. Thus, we suggest that the development of the P-466 standard be tabled and that efforts first be centered on developing a base standard classifying SRSI and similar systems.
We are available to discuss any questions you have in regard to these comments.
_.m Robert L. Tedesco, Assistant Director for Plant Systems Division of Systems Safety
Contact:
R. Naventi x27233 THIS DOCUMENT CONTAINS POOR QUAUTY PAGES cc: See Page 2
-.. - -