ML17201Q499

Rev 52 to OP-204, Power Operations

ML17201Q499
Person / Time
Site:	Crystal River
Issue date:	08/18/1988
From:	FLORIDA POWER CORP.
To:
Shared Package
ML17201Q500	List: ML17201Q499 ML20259D383 ML20259D388 ML20259D393 ML20259D398 ML20259D401 ML20259D406 ML20259D412 ML20259D418 ML20259D424 ML20259D430 ML20259D435 ML20259D441 ML20259D447 ML20259D453 ML20259D459 ML20259D465 ML20259D469 ML20259D474 ML20259D478 ML20259D480 ML20259D484 ML20259D488 ML20259D493 ML20259D497 ML20259D499 ML20259D504 ML20259D509 ML20259D513 ML20259D517 ML20259D522 ML20259D527 ML20259D534 ML20259D539 ML20259D544 ML20259D553 ML20259D558 ML20259D563 ML20259D568 ML20259D573 ML20259D576 ML20259D582 ML20259D585 ML20259D590 ML20259D594 ML20259D598 ML20259D602 ML20259D606 ML20259D610 ML20259D614 ... further results
References
NUDOCS 8902060385
Download: ML17201Q499 (2)

Text

i

• e Commonwealth Edison One First National Plaza. Chicago, Illinois Address Reply to: Post Office Box 767 Chicago, Illinois 60690 January 31, 1989 U.S. Nuclear Regulatory Commission ATTN:

Document Control Desk Washington, DC 20555

Subject:

Zion Station Units 1 and 2 Quad Cities-Station_Units 1 and 2 Dresden Station Units 2 and 3 "A Model Implementation Schedule" NRC Docket Nos. 50-295/304, 50-254/26~

and 50-237/249 Reference (a):

Letter from C.M. Allen to U.S. NRC dated January 1, 1987_.

Dear Sir:

Reference (a) contained our schedule for implementing the A Model at Commonwealth Edison's LaSalle, Zion, Quad Cities and Dresden Stations.

Since the transmittal of the reference letter, the. A Model has been successfully implemented at LaSalle County Station.

The purpose of this letter is to revise the previously tr~nsmitted schedules.

It has been determined that additional time will be required for complete A Model implementation at Zion, Quad Cities and Dresden Stations.

The revised target dates are as follows:

Zion Quad-Cities Dresden December 31, 1989 March 30,- 1990 May 30, 1990 There are four primary reasons for these schedule changes.

Recent QA enhancements require more formalized validation and verification of computer software before it can be considered operational, increasing the development time.

Additionally, there have been numerous scope changes which resulted from additional enhancements to the A-Model due to "lessons learned" at Byron, Braidwood and LaSalle.

These changes, in turn, have added time to the validation and verification process.

U.S. NRC 2 -

January 31, 1989 The remaining reasonsfor the changes in schedule are resource oriented.

Despite increased CECo staffing, the use of contractors and parallelin~ of A-Model activities at Zion, Quad Cities and Dresden when possible to expedite completion of this effort, there are limited experienced res~urces for completion of this effort within the earlier schedule.

Lastly, Edison's expectations of efficiency associated with the implementation of multiple A-Models have not been fully realized.

Until these modifications are complete, the comp~nsatory measures outlined in previous c6rres~o~dence will be continued; If there are any questions regarding this matter; please contact this office.

Very truly yours, Nuclear Licensing lm cc:

A.B. Davis - NRC, Region III Administrator L.R. Gregor -

NRC, Region III D. Muller -

NRR 553l.K