ML20210U008

Notice of Violation from Insp on 860728-0801

ML20210U008
Person / Time
Site:	Browns Ferry
Issue date:	09/29/1986
From:	Zech G NRC - TVA OVERSIGHT GROUP, NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:
Shared Package
ML20210T992	List: ML20210T988 ML20210U008 ML20210U021
References
50-259-86-27, 50-260-86-27, 50-296-86-27, NUDOCS 8610090365
Download: ML20210U008 (2)

Text

E.; .

ENCLOSURE 1 NOTICE OF VIOLATION

-Tennessee Valley Authority Docket Nos. 50-259, 260, and 296 Browns Ferry License Nos. DPR-33, 52, and 68 During the Nuclear Regulatory Commission (NRC) inspection conducted on July 28 -

August 1,1986, a violation of NRC requirements was identified. The violation

-involved a failure to comply with procedural requirements for torquing pressure boundary bolting on safety-related diesel generator cooling water check valves.

In accordance with the " General Statement of Policy and Procedure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C (1985), the violation is listed below:

Technical Specification (TS) 6.3 requires that safety-related preventive maintenance be performed in accordance with written procedural requirements.

Contrary to TS 6.3, safety-related preventive maintenance prescribed and documented by TVA Maintenance Requests-(MRs) 583701 thru 583706, 574683 and 574687, was not performed in accordance with written procedural require-ments. The subject preventive maintenance included reassembly of emergency diesel generator cooling water check valves. The inspections, measurements of bolt size and bolt torquing values utilized in reassembly of the valves

-failed to comply with procedural requirements as follows:

A. TVA Standard Practice BF-3.2 requires the torquing of pressure retain-ing bolting on safety-related valves to be a QC inspection hold point.

The torquing of the pressure retaining valve bolting prescribed by MRs 583701 thru 583706, 574683, and 574687 did not include QC inspec-tior hold points and the MRs indicate that no QC inspection of the torquing was performed.

B. The subject MRs specified that valve bolt torquing was to be performed in accordance with Mechanical Maintenance' Instruction (MMI) 143 which requires that the size and type of bolt be determined and recorded, and that the information be used to select torque values from the tables in MMI 143. All of the bolting materials were 5/8 inch studs with no type or grade identification and on that basis MMI 143 would require a torque value of 93 ft-lbs for all of the valve bolts. In conflict with the MMI 143 procedural requirements:

(1) Bolt size and grade were incorrectly determined and recorded on the following MRs:

(a) MR 583704 (grade recorded as B7)

(b) MR 583701 (size recorded as 3/4 inch and grade as

" alloy steel")

8610090365 860929 PDR ADOCK 05000259 G PDR

I

-Tennessen Valley Authority Docket Nos. 50-259, 260, and 296

! Browns Ferry License Nos. DPR-33, 52, and 68 (2) for the size and grade of bolting (5/8 inch size and indeterminate grade) MI 143 specifies a torque of 93 ft-lbs. Instead, the following torque values were recorded on MMI 143 data sheets, as used:

(a) 200 ft-lbs for MR 583701 (b) 100 ft-lbs for MR 583706 (c) 90 ft-lbs for the remaining MRs This is a Severity Level IV violation (Supplement I).

Pursuant to the provisions of 10 CFR 2.201, Severity Level IV and Supplement I is hereby required to submit to this Office within 30 days of the date of the letter transmitting this Notice a written statement or explanation in reply including (1) admission or denial of the violation, (2) the reason for the violation if admitted, (3) the corrective steps which have been taken and the results achieved, (4) the corrective steps which will be taken to avoid further violations, and (5) the date when full compliance will be achieved. Where good cause is shown, consideration will be given to extending the response time.

FOR THE NUCLEAR REGULATORY COMMISSION V . C u a e\\ % r -

Gary G. Zech, Director TVA Projects Dated at Atlanta, Georgia this $* day of 5%61986

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