ML19321B146
| ML19321B146 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 07/07/1980 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Counsil W CONNECTICUT YANKEE ATOMIC POWER CO. |
| References | |
| TASK-06-10.A, TASK-6-10.A, TASK-RR NUDOCS 8007280180 | |
| Download: ML19321B146 (3) | |
Text
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NUCLEAR REGULATORY COMMISSION y '; c / 3 p,
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July 7,1980 Docket No. 50-213 Mr. W. G. Counsil, Vice President Nuclear Engineering and Operations Connecticut Yankee Atomic Power Company l
Post Office Box 270 Hartford, Connecticut 06101
Dear Mr. Counsil:
You are requested to provide the infarnation specified in the enclosure to this letter regarding the testing of the reactor trip system and engineered safety features for the Haddam Neck Plant.
Receipt of your cesponse is requested not later than December 1,1980.
j Si
- erely, i
Dennis M. Crutchfield, Chi f Operating Reactors Branch #5 Division of Licensing
Enclosure:
Request for Additional Information cc w/ enclosure:
See next page 800gg80 M t.
i 9.
Mr. W. G. Counsil July 7,1980 l
cc w/ enclosure:
Day, Berry & Howard U. S. Environmental Protection i
Counselors at Law Agency One Constitution Plaza Region I Office Hartford, Connecticut 06103 ATTN:
EIS COORDINATOR JFK Federal Building Superintendent Boston, Massachusetts 02203 i
Haddam Neck Plant RFD #1 Post Office Box 127E East Hampton, Connecticut 06424 Mr. James R. Himmelwright Northeast Utilities Service Company P. O. Box 270 Hartford, Connecticut 06101 Russell Library i
119 Broad Street Middletown, Connecticut 064S7 Board of Selectmen Town Hall Haddam, Connecticut 06103 Connecticut Energy Agency ATTN:
Assistant Director Research and Policy Development Department of Planning and Energy Policy 20 Grand Street Hartford, Connecticut 06106 Director, Technical Assessment Division Office of Radiation Programs
( AW-4S9)
U. S. Environmental Protection Agency Crystal Mall '#2 Arlington, Virginia 20460 j
k PAQUEST FOR INFORMATION ON SEP TOPIC VI-10.A
" TESTING 0F REACTOR TRIP SYSTEM AND ENGINEERED SAFETY FEATURES INCLUDING RESPONSE TIME TESTING" As part of our review of this topic we need to determine the extent to which you may be employing jumpers and jury rigs to perform periodic tests of Class IE electrical systems (or the equivalent of such systems in your plant). Such practices would be contrary to current licensing criteria.
Specifically, the use of jury-rigged bypaises such as temporary jumpers, the removal of fuses, or removal of connections are not permitted by Regulatory Guide 1.118.
The basis for this provision is that such practices are not conducive to satisfying the requirements of IEEE Std. 279-1971 Section 4.11 and usually are a violation of Section 4.13.
In addition, the means which are provided for the testing of protection systems should satisfy the requlrements of IEEE Std. 279-1971 Section 4.11 and 4.13.
IEEE Std. 279 Section 4.11 requires that the system be designed to permit testing, calibration and maintenance during power operation without compro-mise of the capability to perform the safety function in the event of a single failure.
(An exemption is granted for one-out-of-two systems where it can be shown that the probability of failure in the remaining channel is acceptably small).
The methods that have been found acceptable to the staff is satisfying the requirements of Section 4.13 (Indication of Bypasses) are presented in Regulatory Guide 1.47.
Because sufficient information as to the extent to which you may use such bypasses has not been found in the docket file, please describe:
(1) The extent to which you use jury-rigged bypasses, and (2) The means that are used to satisfy the basis objective's of current licensing criteria so that during testing:
(a) The protection system meets the single failure criterion, and (b) The operator has clear and accurate indicati.on of sy, stem status (including assurance of knowing that a subsystem is in test and that, when the test is completed, the bypasses have been removed). Where administrative oro-4 cedures are relied upon, please describe them in sufficient detail to allow a comparison with the intent of Regulatory Guide 1.47, i