ML20153D573
| ML20153D573 | |
| Person / Time | |
|---|---|
| Issue date: | 10/31/1997 |
| From: | Zimmerman R NRC (Affiliation Not Assigned) |
| To: | Collins S NRC (Affiliation Not Assigned) |
| Shared Package | |
| ML20153D328 | List: |
| References | |
| NUDOCS 9809250102 | |
| Download: ML20153D573 (1) | |
Text
- J
.a. October 31, 1997 MEMORANDUM TO: Samuel J. Collins, Director !
Office of Nuclear Reactor Regulation
- ROM: Roy P. Zimmerman, Chair Ad-Hoc Review Panel l
SUBJECT:
DIFFERING PROFESSIONAL VIEW CONCERNING TECHNICAL SPECIFICAT!ON TRIP SETPOINTS AND ALLOWABLE VALUES FOR INSTRUMENTATION l
s.
In a memorandum dated March 17,1997, Dale Thatcher, Section Chief, Electrical Engineering Branch (EELB) forwarded to you the differing professional view of Mr. Fred Burrows conceming 4 Technical Specification trip setpoints and allowable values for instrumentation. Mr. Burrows, an electrical engineer in EELB, provided two concems. The first concem is that 10 CFR 50.36,
, " Technical Specifications," requires the trip setpoint by itself be considered the Limiting Safety System Setting, and a closely related second concem is that the NRC Improved Standard Technical Specifications should focus on the trip setpoint, not the allowable value, since it is only the trip setpoint that accounts for all the instrument errors. Additional concems were developed during the Panel's review, All concems are discussed in the enclosed report.
Your memorandum dated March 24,1997, designated that an ad-hoc panel be formed to review this differing professional view. The members of the Ad-Hoc Review Panelwere Roy Zimmerman as Chair, Bruce Boger as a management member, and Tom Dunning as a staff member as recommended by Mr. Burrows. Anthony Mendiola served as technical assistant to the Panel.
Enclosed is the Panel's report with its findings, conclusions, and recommendations.
DISTRIBUTION AJMendiola OFFICE ADPR:NRR NAME RPZimmermand DATE 10/3/ /97 OFFICIAL RECORD COPY a
9909250102 980915 PDR TOPRP EMWEST C PM A t01 y fD ID3-
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