ML20078G518

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Provides Supplemental Response to IE Bulletin 80-16 Re Misapplication of Rosemount Transmitters.All Changeouts in NSSS Sys for Unit 2 Complete
ML20078G518
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 10/04/1983
From: Barnes P
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-SSINS-6820 7410N, IEB-80-16, NUDOCS 8310120290
Download: ML20078G518 (2)


Text

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    • [OD Commonweahh

) one First Nationsi Plaza Edison Chicago, tilinois b

g C ' Address Reply to: Post Office Box 767

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/ Chicago, Illinois 60690 October 04, 1983 Mr. James G. Keppler, Regional Administrator

- Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

LaSalle County Station Units 1 and 2 Supplemental Response to IE Bulletin 80-16 Misapplication of Rosemount Transmitters NRC Docket Nos. 50-373/374 _

References (a): J. G. Keppler letter to C. Reco dated

June 27, 1980 (TJR 80-3)

(b): T. J. Rausch letter to J. G. Keppler dated August 29, 1980 (LOD 80-185)

(c): T. J. Rausch letter to J. G. Keppler dated November 10, 1980 (TJR 80-78)

(d): E. D. Swartz letter to J. G. Keppler dated October 8, 1981 (EDS81-106) 1

Dear Mr. Keppler:

In response to Reference (a) request for information contained in IE Bulletin 80-16, Reference (b) documented the results of our LaSalle County Station BOP review. Additionally, References (b), (c) and (d) provided results of the LaSalle County Station NSSS l evaluation for Unit 1 and a commitment to complete Unit 2 prior to the Unit 2 fuel load date.

For the NSSS system, GE issued FDI TEEX in January 1981 to upgrade all affected safety-related instruments having either an 4 or D option code to those having E option codes. Once the radiatian sensitivity of the E board came to light, GE issued FDI TEGA in December 1981 to replace these with H boards, thereby arriving at an acceptable configuration. As of this date, all changeouts in the NSSS system for Unit 2 are complete.

To the best of my knowledge and belief the statements contained herein are true and correct. In some respects these statements are not based on my personal xnowledge but upon information furnished by other Commonwealth Edison employees, contractors and consultants. Such information has been reviewed in occordance with Company practice 9.nd ! believe it to be reliable. (,

8310120290 831004 OCT 5 1983 l

PDR ADOCK 05000373 Tr O l

e p **9 .y Please address any questions that you may have concerning

. this matter to.this office.

Respectfully, i .

>P. L. Barnes Nuclear Licensing Administrator c'c :' USNRC-Document Control Desk Washington, DC 20555 RIII Inspector - LSCS 4

SUBSCRIBED and SWORN to

.. before me this %cd day of SetA1/ A__/ , 1983 MeL Y 0- r i EJ Notary Public 7410N 4

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