ML20100G104

Forwards Updated Status of Environ Qualification of All Equipment,Per 850325 Meeting.Explanation of Addl Components Not Meeting Requirements of NUREG-0588 Also Encl

ML20100G104
Person / Time
Site:	Sequoyah
Issue date:	03/27/1985
From:	Mccloud D TENNESSEE VALLEY AUTHORITY
To:	Harold Denton Office of Nuclear Reactor Regulation
References
RTR-NUREG-0588, RTR-NUREG-588 NUDOCS 8504080074
Download: ML20100G104 (7)

Text

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. TENNESSEE VALLEY AUTHORITY 1 CHATTANOOGA. TENNESSEE '374ol 1

1630 Chestnut Street Tower II March 27, 1985 i

i' Mr. Harold R. Denton, Director

- Office'.of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission l - Washington,-D.C. 20555 i I

Dear Mr. Denton:

In the Matter of- ) Docket Nos. 50-327 Tennessee Valley Authority  :)

50-328 By the April-3, 1984: letter to H. G. Parris from you.and by your November 30, 1984 letter to H. ,G. Parris, NRC approved TVA's request. for extension of the deadlines for units -1 and 2 at our Sequoyah Nuclear Plant for environmental qualification of electrical equipment. .In subsequent letters to NRC, in accordance with the requirements of 10 CFR 50.49(h), TVA provided notification

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.of discovery of a'dditional components that do not meet the requirements of

.NUREG-0588 for qualification. - As requested in the. March 25, 1985 meeting with NRC, regarding environmental qualification, enclosed is an updated status of

'SQN's progress to complete environmental qualification of all equipment, as a well as an explanation of the items that have been added since our approved extension request dated March 23, 1984 for 166~ items.

If you have any questions concerning this matter, please get in touch

• withR. E. Alsup at FTS 858-2725.

Very truly yours, vammEE VALLEY AUTHORITY -

WV D. E. McCloud!

Nuclear Engineer' n .

. Sworn o d subscr g d before me '

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' An Equal Opportunity Employer --- [ -

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.Mr. Harold R..Denton March 27, 1985 '

cc (Enclosures):

..U.S.-Nuclear Regulatory Commission

' Region II .

Attn: Dr. J. Nelson Grace, Regional Administrator _

s 101 Marietta Street, NW, ' Suite 2900 ' "

Atlante, Georgia' 30323 Mr. Carl Stahle U.S. Nuclear Regulatory Commission Sequoyah Project Manager -

7920 Norfolk Avenue ,

, Bethesda, Maryland 2081!4- y m

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ENCLOSURE 1

~ CURRENT STATUS

SUMMARY

OF SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 WITH REGARDING T0.10 CFR 50.49 The current status summary of Sequoyah units 1 and 2 with regard to 10 CFR 50.49 is provided in table 1.

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Sequoyah unit 1 As provided in enclosure 2, Sequoyah unit 1 during its second

- refueling outage (February 20, 1984 through April 17, 1984) lacked 166 replacement components due to procurement / delivery-related and installation-related problems. TVA has currently been averaging

replacing two to three non-outage components per week on Sequoyah

, unit 1. If possible, TVA' will continue to work non-outage components during power operation. In addition, TVA is currently scheduling an approximately 16-day ice weighing outage on Sequoyah

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unit 1 during the later part of April. TVA plans to rer' ce a substantial portion of the remaining Category IV compo . '" ring the outage. TVA has committed to be in compliance with lu CFR 50.49

. by startup following the unit' I cycle 3 refueling outage which is

currently s'cheduled for September 1985, but in no event later than November-30, 1985.

s Sequoyah unit 2 Since our November 7 and 21,, 1984 letters to NRC, we have reduced

/ the' number of Category IV components by one item. TVA plans to replace this component at the earliest practical time, but in no event later than Noveaber 30, 1985.

TVA believes Sequoyah has acted in good faith in reducing the number of Category III and IV-components for both units and 'ill continue to qualify these items as soon as possible. (Based ou our understanding of the environmental e;quipment qualification required by 10 CFR 50.49, Sequoyah will be in full-compliance with those requirements no later than November 30, 1985 for both units.)

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ENCLOSURE 2 EXTENSION REQUEST SUBMITTALS Approximate No.

of Unqualified Item Components Comments / Reasons Letter to NRC dated November 14, 1983 124 Included in March 23, 1984 submittal Letter to NRC dated March 23,-1984 166 a. 133 Procurement Related

. (qualified components not available onsite at time of refueling outage) problems

b. 33 components experience design / installation (e.g., qualified compo-nents unavilable; there-fore design had to be changed to relocate) problems Letter to NRC dated April 3, 1984 N/A Additional information provided at NRC's request Letter from NRC dated April 11, 1984 N/A Approval granted for TVA's

+ letters dated November 14, March 23, and April 3,1984 Letter to NRC dated April 13, 1984 125 a. 6 components experienced design / installation

{ related problems. These

-components have now been relocated.

b. 6 components could not be installed due to noncon-formance (inadequate vendor documentation) of replacement components.

The nonconformance has been cleared and the com-ponents have now been intalled, i

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ENCLOSURE 2 (CONTINUED)

APPROXIMATE NO.

OF UNQUALIFIED .

UNIT ITEM COMPONENTS COMMENTS / REASONS 1 Letter to NRC dated May 14, 1984 8' TVA failed to identify these components (steam generator level control valve

' positioners) which were being tested.

These items have now completed qualifi-cation testing.

1 Letter to NRC dated September 7, 6# 6 components were recategorized to 1984 Category IV due to recent main steam superheat-issue inside and outside containment as identified by Westinghouse and IE Notice 84-90.

1 Letter to NRC dated December 20, 588 As a result of a Watts Bar 1984 nonconformance report, TVA determined that some components (e.g., solenoid valves, limit switches) for Sequoyah lacked sufficient documentation to determine if qualified sealing devices were installed.

1 Letter to NRC dated January 8, 16' a. 8 components recategorized to 1985 Category IV as a result of our review of Operations and Maintenance Reminder (0&MR) 194. *

b. 4 components were determined unqualified to 10 CFR 50.49 requirements during review by TVA.

Three out of four of those

• components have been replaced. *

c. TVA discovered 4 solenoid valves not replaced as required. TVA immed!.ately rep'_ aced these components.

4 ENCLOSURE 2 (CONTINUED) .

2 Letter to NRC dated November 7,1984 19 Included in November 21, 1984 letter 2 Letter to NRC dated November 21, 1984 19 e..(8) components testing

b. (10) components with procurement related problems.

c. (1) component replaced 2 Letter to NRC dated November 30, 1984 Approval granted for TVA's letters dated November 7 and 21, 1984

'Approximately 7 out-of the additional 100 components have completed qualification testing or have been replaced / relocated.

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TABLE 1 STATUS'

SUMMARY

OF SEQUOYAH UNITS 1 AND 2 WITH REGARD TO 10 CFR 50.49 Category II Category IV Compliance Components Components Percentage Unit 1. 8' 150 90 4

Unit 2 -8' 1 99

-Notes: 1. The Category III components identified as.those requiring additional testing i

2. The Category IV components are identified as those requiring replacement / relocations

1. TVA has just received the test reports which qualify the 16 components in question.

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