Transmittal of NUREG-0763, "Guidelines for Confirmatory In-plant Tests of Safety-Relief Valve Discharges for BWR Plants," and NUREG-0783, "Suppression Pool Temperature Limits for BWR Containments." (Generic Letter No. 82-27)
UNITED STATES
NUCLEAR REGULATORY COMMISSION
WASHINGTON, D.C. 20555
November 15, 1982
ALL BOILING WATER REACTOR LICENSEES OF OPERATING REACTORS (EXCEPT LACROSSE,
BIG ROCK POINT, DRESDEN 1, HUMBOLDT BAY) APPLICANTS FOR AN OPERATING LICENSE
AND HOLDERS OF CONSTRUCTION PERMITS. (GENERIC LETTER NO. 82-27 )
Gentlemen:
SUBJECT: TRANSMITTAL OF NUREG-0763, "GUIDELINES FOR CONFIRMATORY IN-PLANT
TESTS OF SAFETY-RELIEF VALVE DISCHARGES FOR BWR PLANTS," AND
NUREG-0783, "SUPPRESSION POOL TEMPERATURE LIMITS FOR BWR
CONTAINMENTS."
Enclosed are copies of NUREGs-0763 and 0783. These documents are being
issued to provide guidance that the NRC staff believes should be followed to
meet the requirements of General Design Criteria 16 and 29 of Appendix A to
10 CFR Part 50. These NUREGs are not a substitute for the regulations, and
compliance is not a requirement. However, an approach or method different
from the guidance contained herein will be accepted if the substitute
approach or method provides a basis for determining that the requirements of
General Design Criteria 16 and 29 have been met.
NUREG-0763 provides guidance for: (1) determining if in-plant safety relief
valve (SRV) tests are required, (2) formulating appropriate test matrices,
(3) establishing test procedures, (4) selecting necessary instrumentation,
and (5) reporting test results. Implementation of the guidelines is
described in Section 9 of the report. It should be noted, however, that the
guidelines are intended for providing information for SRV in-plant tests
which are still in the planning stage.
If the licensees/applicants have performed or installed instrumentation for
SRV in-plant tests in accordance with the acceptance criteria specified in
NUREG-0661, "Mark I Containment Long Term Program," we find this approach
acceptable.
NUREG-0783 provides: (1) acceptance criteria related to the suppression pool
temperature limits, (2) the events required to analyze the suppression pool
temperature response, (3) assumptions used for the analyses, and (4)
requirements for the suppression pool temperature monitoring system.
Implementation of this issue is described in Section 6 of the report. The
acceptance criteria specified in the report can be considered a relaxation
of the existing suppression pool temperature limit criteria which are
specified in NUREG-0661 (Mark I) and NUREG-0487 "Mark II Containment Lead
Program Load Evaluations and Acceptance Criteria."
The application, reporting and record-keeping requirements contained in
NUREG-0763 have been approved by the Office of Management and Budget: OMB
approval No. 3150-0074 which expires July 31, 1983.
8211230066
.
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The application, reporting and record-keeping requirements contained in
NUREG-0783 have been approved by the Office of Management and Budget; OMB
Approval No. 3150-0082 which expires December 31, 1982.
Darrell G. Eisenhut, Director
Division of Licensing
Office of Nuclear Reactor Regulation
Enclosures as stated
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