ML20050B020

Interim Deficiency Rept 3 for PRD-81/44 Re Unqualified Bettis Air Actuators on Henry Pratt Valves,Originally Reported on 811029.Seals,lubricants & Coating on Pins & Rollers to Be Upgraded Prior to Operation.Final Rept 820420

ML20050B020
Person / Time
Site:	Grand Gulf
Issue date:	03/15/1982
From:	Mcgaughy J TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, AECM-82-97, NUDOCS 8204020504
Download: ML20050B020 (4)

Text

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MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi 1 M P. O. B O X 16 4 0. J A C K S O N. MI S SI S SIP PI 3 9 2 0 5 ,

J AMES P McGAUGetY. JH March 15,1982 fl A5% 57 ANT VICE 8'Pf S'DI NT ,j Of fice of Inspection & Enforcement

U. S. Nuclear Regulatory Commission Region II 101 Ma rietta St reet, N.W. N/

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Suite 3100 Q

9 Atlanta, Georgic 30303 1 4'r, y ~

Attention: Mr. J. P. O'Reilly, Regional Administrator I f !N2x/)

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. .. .? f, j Dea r Mr. O'Reilly:

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SUBJECT:

Grand Gulf Nuclear S < tb Units 1 and 2 Do cke t No s . 50-416/417 File 0260/15525/1552 6 PRD-81/44, Interim Repor t No. 3, Unqualified Bettis Air Actuators on Henry Pratt Valves A3CM-82/97

References:

1) AECM-82 /4 5, 1/29 /82

2) AECN-81/470, 11/30/81 On October 29, 1981, Mississippi Power & Light Company notified Mr. P. A.

Taylor, of your of fice, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns unqualified Bettis Air Actuators on Henry Pratt Valves.

Our investigation into reportability, cause, and extent is continuing.

Details are included in our attached Interim Report. We expect to submit a Final Report by April 20, 1982.

Yours t ruly ,

J. P. McGaughy , Jr.

KDS :d r ATTACINENT '

cc: See page 2

[l[ICIAL COPY 8204020504 820315 f /

DR ADOCK 05000 r Middle South Utilities Systeiri j 7

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Mr. J. P. O'Reilly AECM-82/97 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. N1clea r Regulatory Commission Washington, D.C. 20555 l

Mr. G. B. Taylor l South Miss. Electric Power Association P. O. Box 1589 lbttlesburg, MS 39401

Attachment to AECM-82/97 Page 1 of 2 INTERIM REPORT No. 3 FOR PRD-81/44

1. Description of the Deficiency Bettis Air Actuators furnished with certain Henry Pratt butterfly valves under specifications M-257.0 and M-258.0 are not typical of the units utilized for original Qualification Testing.

Investigative data indicates that the delivered valve actuators do not match the units originally qualified. In some cases, there has beer. a design dif ference between the actuators that were delivered and the units qualified. In all cases, the materials of construction have been different. Therefore, a direct correlation to verify functional oper-ability cannot be made at this time.

The defective actuators are located in both Unit 1 and Unit 2.

The deficiency is known to af fect the Containment Cooling System (M41),

the Auxiliary Building Ventilation System (T41), the Fuel Handling Area Ventilation System (T42) and the Control Room HVAC System (Z51). It does not apply to the NSSS vendor.

The potential exists that the valves would not function under seismic and environmental conditions, as required by our Constructor's specifi-cations. If the condition had remained uncorrected, it is possible that the actuators may not perform their intended safety function.

We are continuing our investigation into reportability under the provi-sions of 10CFR50.55(e).

II. Approach to Resolution of the Problem

~ The specific cause of the deficiency is that the actuators were not manufactured under a QA program by the G. H. Bettis Company.

Seismic testing was performed on a T420-SR1 actuator by Wyle Laboratories, Huntsville, Alabama. The actuator tested, successf ully passed the seismic tests. However, since the actuators were not manu-factured under a QA program, there is no assurance that the actuators installed on the valves are similar in design and materials, to the actuator that was seismically qualified. The actuators presently installed will be disassembled and inspected to determine their simi-larity to the one that was seismically qualified. Af ter this has been completed, acceptability of the actuators as to seismic qualifications, ef fect on safety, and reportability will be determined.

I Attachment to AECM-82/97 Page 2 of 2 III. Status of Proposed Resolution It has been determined that failure of the actuators due to degradation of the internals would not affect safety. The actuators are spring return models and will fail in the safe position.

MP&L, however, has elected to upgrade the seals, lubricants, and coat-ing on the pins and rollers prior to commercial operation. This will minimize future plant outage time in the case of a harsh environment condition which could degrade these materials.

The effects on safety if it is determined that the actuators are not seismically qualified, has not been determined. We are awaiting the results of the actuator inspections to determine their seismic qualifi-cations and ef fects on safety.

IV. Reason Why A Final Report Will Be Delayed Mississippi Power and Light is investigating the acceptability as to seismic qualifications of the actust. ors that were not manufactured under a QA program.

V. Date When Final Report Will Be Submitted A Final Report will be submitted by April 20, 1982.

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