ML20041F973

Final Deficiency Rept Re Henry Pratt ASME Class III Butterfly Valves Not Meeting Closing Time Requirements. Solenoid Valves Replaced & Vendor Documentation Revised. Bechtel Rept Encl

ML20041F973
Person / Time
Site:	Grand Gulf
Issue date:	03/03/1982
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, AECM-82-23, HECM-82123, NUDOCS 8203170607
Download: ML20041F973 (6)

Text

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._4 MISSISSIPPI POWER & LIGHT COMPANY.

] Helping Build Mississippi EdhMlaudd5 P. O. l39205 B O X 16 4 0, J A C K S O N , M I S S I S S Wg19 g TsN,.rT$^jf,$[ March 3, 1982 ag* /U Office of Inspection & Enforcement O U. S. Nuclear Regulatory Commission b

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, ,s Region II 101 Marietta Street, N.W. ~ p 'Gg .;,/i '"

Suite 3100 '

c,M c 7 J p78 Atlanta, Georgia 30303 3 .'i . , 8g ,[

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Attention: Mr. J. P. O'Reilly, Regional Administrator '[ * '

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Dear Mr. O'Reilly:

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SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket Nos. 50-416 File 0260/15525/15526 PRD-81/27, Final Report ,

Valve Closure Times AECM-82/23 On May 27,1981, Mississippi Power & Light Company notified Mr. F.

Cantrell, of your office, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns eight (8) Henry Pratt valves that do not meet the closing time requirements per specification.

We have completed car ;nvestigation of this matter and have determined that this deficiency is repartable under the provisions of 10CFR50.55(e) for MP&L but not under the provisions of 10CFR21.

The deficiency, however, is reportable under 10CFR21 for Bechtel Power Corporation, as this was a received component. Mr. P. A. Taylor, of your office was notified by phone on November 20, 1981, of this reporting requirement for Bechtel Power Corporation. He agreed that Bechtel's 10CFR21 report could be included as an attachment to MP&L's Final 50.55(e) Report.

Bechtel's 10CFR21 Report is included as Attachment B.

'1his report was originally due on January 14, 1982, but an extension until March 3,1982, was granted by Mr. Chuck Burger on that date and Mr. Ross Butcher on January 18, 1982.

Yours truly, 8203170607 820303 PDR ADOCK 05000416 5 PDR f f . P.JMcGaughy, Jr. .,3 9 m9R

.A KDS:dr ATTACIDiENT 4 cc: See page 2 Member Middle South Utilities System 7/

Mr. J. P. O'Reilly AECM-82/23 NRC Page 2 cc: Mr. N. L. Stampley ,,

Mr. R. B. McGehee Mr. T. B. Conner -

Mr. Richard C. DeYoung, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission ~ _ ,

Washington, D.C. 20555 Mr. G. B. Taylor South Miss. Electric Power Association P. O. Box 1589 llattiesburg, MS 39401 s v.

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Attrchm;nt A to AECM-82/23 Page 1 of 2 P

FINAL REPORT TO PRD-81/27 I. Description of the Deficiency Eight (8) Henry Pratt ASME Class III butterfly valves with Bettis T-3128-SR3 actuators, when tested by our Constructor, had closing times greater than four (4) seconds as given in the purchase specification.

The vent ports, in the ASCO solenoid NP8321A6E were too small to allow th'e cylinder to exhaust in four (4) seconds.

The valves are located in the Containment Cooling ' System (M41) and provide containst:nt and drywell dsclation. The deficiency affects only Unit 1. -

This deficiency does not apply to the NSSS vendor.

U. Analysis of Safety Implications Valveer Q1M41F011,,Q1M41F012, Q1M41F034 and Q1M41F035, which are four of the eight (8) affected,, are primaty containment isolation valves for the 20-inch diameter containm " marge penetrations. The Grand Gulf FSAR commits to a 4 second r time of these penetr,ntions and dose analyses are based on this _and closure time. Closing times on these four (4) valves of greater than 4 seconds would increase site boundary dose contributions from the containment purge penetrations.

Personnel safety could nct be assured. Therefore, this deficiency could adversely affect the safety of operations of the nuclear power plant and is reportable under the provisions of 10CFR50.55(e).

The deficiency is not reportdble under 10CFR21 for MP&L cince the effected system was turned over to MP&L with the cited condition already identified. _

, e Our Constructor, Bechtel Power Corporation, has determined that this deficiency is a subtantial safety hazard and meets the re, porting requirements of 10dFK21 for Bechtel Power Corporation since the valves were a received component . Bechtel's 10CFE2,1 report is included in this report as Attachment B. .

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IT. I . Corratetive Actions Taken \

Jhls ' deficiency relates to \g documentation error by Henry Pratt Co.

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that occurred several years igo.

~L Inselectingsolenoidsthatwereenvironmentallyqualifiedforuse\at CGNS, Henry Pratt Company inadvertently utilized incorrect documenta-tion reflecting solenoids that had been on the valves which had closure A cycles'excedding the specified time parameters. In an effort to avoid

( ,A schedule delays, our Constructor procured the recommended solenoid \

valves directly from ASCO. -

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, Attcchment A to AECM-82/23

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When our. Constructor notified Henry Pratt Company of the deficiency discovered during testing, Pratt acknowledged that their documentation was in error. The documentation error by Pratt was the root cause of the problem.

Henry Pratt Company has stated that the problem was limited to valves supplied tb GGNS. Our Constructor has investigated the deficiency at CCNS and has concluded that the extent is limited to the eight (8) valves mentioned previously.

Henry Pratt Company's documentation is being revised to reflect the correct information. All corrective actions for Unit I have been completed. The solenoid valves have been replaced with the correct solenoids with the proper closing time.

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• l'* Nr mb2r 23, 1981 At tachm:nt B to AECM-82/23 i

Page 1 of 2 ATTACHMEllT "A" TO PRD 81/27 CLOSING TIME OF AIR ACTUATED VALVES PART 21 REPORT

1. Name and address of the individuals... informing the commission:

J. R. Valdez Quality Assurance Supervisor Bechtel Power Corporation Post Office Box 41 .

Port Gibson, Mississippi 39150 T. E. Reaves, Jr.

Manager of Quality Assurance Mississippi Power & Light Company City Center North 210 South Lamar Street Suite 320 Jackson, Mississippi 39201 Per telephone call on November 20, 1981 with Mr. P. A. Taylor, Region II, it was confirmed that the 10 CFR 50.55(e) time requirements for the written report could be applied and, as such, MP&L was requested to include this report with their 50.55(e) report.

2. Identification of the facilty...which...contains a defect:

Grand Gulf Nuclear Station Unit I Port Gibson, Mississippi 39150

3. Identification of the firm... supplying the basic component which...

contains a defect:

Supplied to Bechtel Power Corporation by the Henry Pratt Company, Aurora, Illinois.

4. Nature of the defect...and the safety hazard which...could be created by such a defect...:

a. Eight (8) Butterfly valves supplied by Henry Pratt with Bettis Air Actuator, model #T-312B-SR3, do not conform to the specification closing time requirements. The vent ports in the solenoid, model number NP8321A6E, are,tco small to allow the cylinder to exhaust in 4 seconds. The actual closing time, as tested by our CTO, is 12 seconds.

b. The valves in question are primary containment /drywell isolation valves. Failure of these valves to close in the required time-

Attachment B to AECM-82/23 o { (fage 2 of 2 Attachment "A" to PRD 81/27 Part 21 Report November 23, 1981 Page two span could increase site boundry dose contributions; therefore, a substantial safety hazard could be created.

5. The date on which the information of such defect...was obtained.

. The date on which our responsible officer was notified was November 19, 1981.

6. In the case of the basic component...the number and location of all such components.

The eight valves with the noted condition are installed in system M-41, containment cooling system, Unit I. The supplier, Henry Pratt, has stated that the problem is limited in scope to valves supplied to Grand Gulf only and was an isolated case.

7. The corrective action which has been taken...the name of the individual...

responsible for the action; and the length of time that has been...

taken to complete the action:

Henry Pratt has provided new solenoid valves, model #NP831655E.

Henry Pratt's documentation is being revised to incorporate the proper solenoid valves. This' action will be completed by December 31, 1931.

The new solenoids have been provided to MP&L. MP&L will replace the incorrect solenoids with the new solenoids prior to fuel load.

Startup Field Report #SFR-1-M-1386 identified the condition on April 29, 1981.

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8. Any advice related to the defect...that has been, is being, or will be given to purchasers or licensees:

Since the deficiency did not originate with Bechtel, we have no advice to offer.

Very truly yours, J. R. Valdez JRV:dc31.0 1

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