ML20045C212

Notice of Violation from Insp on 930325-0426.Violation Noted:On 911231,Unit 2 Steam Generator 2 Declared Operable Despite Defective Tube Not Being Plugged

ML20045C212
Person / Time
Site:	Palo Verde
Issue date:	05/28/1993
From:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
To:
Shared Package
ML20045C207	List: ML20045C212
References
50-528-93-11, 50-529-93-11, NUDOCS 9306220215
Download: ML20045C212 (2)

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i NOTICE OF VIOLATION Arizona Public Service Co.

Docket Nos. 50-528 and 50-529 Palo Verde Units 1 and 2 License Nos. NPF-41 and NPF-51 During an NRC inspection conducted on March 25 through April 26, 1993, two violations of NRC requirements were identified.

In accordance with the

" General Statement of Policy and Procedure for NRC Enforcement Actions," 10 i

CFR Part 2, Appendix C, the violations are listed below:

A.

Unit 2 Technical Specification 4.4.4.4.a states that the plugging limit is an imperfection depth at or beyond which the tube shall be removed

- J from service and is equal to 40% of the nominal tube wall thickness, and that such tubes are defective. Technical Specification 4.4.4.4.b states that the steam generator shall be determined OPERABLE after completing the corresponding actions (plug all tubes exceeding the plugging limit) required by Table 4.4-2.

Table 4.4-2 requires defective tubes to be plugged.

i Contrary to the above, on December 31, 1991, Unit 2 steam generator l

number 2 was declared OPERABLE despite defective tube R17-C152 not being plugged.

This tube had an imperfection depth of 70% of the nominal tube wall thickness, exceeding the plugging limit of 40%.

This is a Severity Level IV violation (Supplement I) applicable to Unit 2.

B.

Unit 1 Technical Specification 6.8.1 states, in part, that written procedures shall be established, implemented and maintained covering the applicable procedures recommended in Appendix 'A' of Regulatory Guide 1.33, February, 1978.

Regulatory Guide 1.33, Appendix A states, in part, that maintenance that can affect the performance of safety-related equipment should be properly preplanned and performed in accordance with written procedures, i

Jocumented instructions, or drawings appropriate to the circumstances.

Procedure 30DP-9MP01, Revision 4.09, " Conduct of Maintenance,"_ step 3.10.2, states that the Work Group Supervisor (WGS) indicates, by l

signature, proper completion of the work and work package documentation.

Contrary to the above, on November 18, 1992, the Work Group Supervisor signed Work Order 00365041 as complete without updating the valve designation list after a valve was replaced, as specified by the work order.

This is a Severity Level IV Violation (Supplement I) applicable to-Unit 1.

Pursuant to the provisions of 10 CFR 2.201, Arizona Public. Service Company is hereby required to submit a written statement or explanation to the U. S.

Nuclear Regulatory Commission, ATTN: Document Control Desk, Washington, D.C.

93062202.15 930528 PDR ADOCK 05000528 O

FDR i

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20555 with a copy to the Regional Administrator, Region V, and a copy to the NRC Resident inspector at the facility that is the subject of this Notice, within 30 days of the date of the letter transmitting this Notice of Violation (Notice). This reply should be clearly marked as a " Reply to a Notice of Violation" and should include for each violation:

(1) the reason for the violation, or, if contested, the basis for disputing the violation, (2) the corrective steps that have been taken and the results achieved, (3) the corrective steps that will be taken to avoid further violations, and (4) the date when full compliance will be achieved.

If an adequate reply is not received within the time specified in this Notice, the Commission may issue an order or a demand for information as to why the license should not be modified, suspended, or revoked, or why such other action as may be proper should not be taken. Where good cause is shown, consideration will be given to extending the response time.

Dated at Walnut Creek, California this May of May,1993 l

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