Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
GL80053
UNITED STATES
NUCLEAR REGULATORY COMMISSION
WASHINGTON, D. C. 20555
June 11, 1980
MEMORANDUM FOR: Thomas M. Novak, Assistant Director for
Operating Reactors
Division of License, NRR
Gus C. Lainas, Assistant Director for
Safety Assessment
Division of Licensing, NRR
FROM: Darrell G. Eisenhut, Director
Division of Licensing, NRR
SUBJECT: GENERIC LETTER CONCERNING DECAY HEAT REMOVAL CAPABILITY
Attached is a generic letter to all operating PWR's which requests licensees
to amend the Technical Specifications (TS) for their facilities concerning
decay heat removal capability. Also attached are model TSs for each of the
three PWR vendor types of plants. The letter, with the appropriate version
of the model TSs should be sent to licensees by each Operating Reactor
Branch within the next week.
The estimated total manpower expenditure for review of submitted TSs is 0.1
manyear per reactor site or about 5.0 manyears. The lead engineer assigned
is Daniel Garner, (Room 334, ext. 27435). He will initiate TACS for all
facilities and will forward sheets to Project Managers for completion.
Darrell G. Eisenhut, Director
Division of Licensing, NRR
Attachments: As stated
.
UNITED STATES
NUCLEAR REGULATORY COMMISSION
WASHINGTON, D. C. 20555
TO ALL OPERATING PRESSURIZED WATER REACTORS (PWR'S)
Gentlemen:
This letter transmits the request that you amend the Technical
Specifications (TSs) for your facility with respect to reactor decay heat
removal capability. The basis for our request is founded in a number of
events that have occurred at operating PwR facilities where decay heat
removal capability has been seriously degraded due to inadequate
administrative controls utilized when the plants were in shutdown modes of
operation. One of these events occurred at the Davis-Besse, unit No. 1 plant
on April 19, 1980, which was described in IE Information Notice 80-20 dated
May 8, 1980. In IE Bulletin 80-12 dated may 9. 1980, you were requested to
immediately implement administrative controls which would ensure that proper
means are available to provide redundant methods of decay heat removal.
While the function of the bulletin was to effect immediate action with
regard to this problem, we consider it necessary that an amendment of your
license be made to provide for permanent long terms assurance that
redundancy in decay heat removal capability will be maintained.
You are requested to propose TS changes for your facility that provide for
redundancy in decay heat removal capability for your plant(s) in all modes
of operation. To assist you in preparing your submittals we have enclosed a
copy of Model TSs which would provide an acceptable resolution of our
concern. Your proposal should use the enclosure as a guide and should
include an appropriate Safety Analysis as a basis.
It is requested that you submit your proposed TSs with the basis within 120
days of receipt of this letter. If you have any questions about this matter,
please contact your Project Manager.
Sincerely,
Darrell G. Eisenhut, Director
Division of Licensing
Enclosure: Model TSs
concerning Decay Heat
Removal Capability