ML19338F529
| ML19338F529 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 10/07/1980 |
| From: | Laudenbach D EG&G, INC. |
| To: | Wilson R Office of Nuclear Reactor Regulation |
| References | |
| DL:80-14, IEB-80-06, IEB-80-6, NUDOCS 8010200467 | |
| Download: ML19338F529 (2) | |
Text
'
A.
hEGnG Energy Measurements Group
- San Ramon Operations 2801 OLD CROW CANYON AOAD. SAN RAMON. CA e TEL (415) 837-5381 e Malt BOX 204. SAN R AMON. CA 94583 7 October 1980 DL: 80/14 Mr. R. C. Wilson U.S. Nuclear Regulatory Commission Division of Systems Integration Instrumentation and Control Systems Branch
- P722E 7920 Norfolk Avenue Rethesda, MD 20014
SUBJECT:
D. C. Cook Nuclear Plant Units 1 and 2 Docket Nos. 50-315 and 50-316 IE Bulletin 80-06, ESF Reset Controls
Dear Di,
ck:
The licensee, Indiana and Michigan Electric Company, indicate ir their letter dated June 20, 1980, in response to IE Bulletin 80-06 that:
(1) Review of drawings for the systems serving safety-related functions to determine the mode of operation following reset of an ESF actuation signal has been completed.
'he results of the findings, the type and schedule of proposed modifications are described in the letter atta-hment.
-(2) Testing do demonstrate that all equipment remains in its emergency mode following ESF reset will be performed during the unit's refueling outages to take place in the spring of 1981 (Unit 2) and in 1
the summer of '1981 (Unit 1).
Note 3 on page 5 of the attachment to the licensees letter dated June 20, 1980, indicates that the component cooling water fans control circuit will be modified to allow the fans to continue running after load conservation reset. Note 4 on page 5 of the attachment indicates that the control circuit controlling the Auxiliary Building Charcoal Filter Dampers will be' modified to prevent their reopening upon the reset of the CI-B signal. Note 5 on page 5 of the attachment indicates I
O Q
y 9l$
8610200g
?w.
Mr..R. C. Wilson Page 2 7 October 1980 that the control circuit for~ the containment recirculation fans will be modified to prevent the fans either from not starting si from tripping when resetting the CI-B signal.
Action Item 4 of IE Bulletin 80-06 requires that the licensee provide a schedule for the implerentation of corrective action.
The schedule of implementation of the modifications by the licensee is vague.
The cover letter indicates in paragraph 2 that the schedule of proposed modifications are described in the attachment to the letter.
Page 4 of the attachment indicates that the schedule to complete the planned modifications has beer given in the cover letter. The only schedule addressed in the cover letter is the " testing" schedule to demonstrate that all equipment remains in its emergency mode following an ESF r(set.
Action Item 3 of IE Bulletin 80-06 requires that the licensee descrih; the proposed system modification, design change, or other corrective action planned to resolve the problem.
The licensee did NOT provide a description of the modification planned for D. C. Cook 1 and 2.
In order to expedite the technical review at this activity, it is requested that the licensee provide a detailed description (including schematics er sketches) of the modifications planned for D. C. Cook 1 and 2, as well as a schedule for their implementation.
Sincerely,
/VL-D. H. Laudenbach Senior Technologist DHL/vg EGSG/SRO LLNL NRC J. H. Cooper M. H. Dittmore P. C. Shemanski D. B. Hackett K. D. Jacoby W. Koutanis B. G. Mayn M. W. Nishimura