ML20102A804

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Forwards Request for Relief from ASME Code for Recording Stroke Test Data Requirements for Category a & B Valves Located on Control Air Headers for Dg.Valves Will Be Removed During Planned Mod
ML20102A804
Person / Time
Site: McGuire, Mcguire  Duke Energy icon.png
Issue date: 07/08/1992
From: Mcmeekin T
DUKE POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9207270320
Download: ML20102A804 (5)
v • d • e


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Duke kgr Comparty

. T C ALutmv kfcGuin Nuctrar Generation Department lice President 12700 liagets l'erry kJ UtG01A)

(?H)ST54mo 11untersrith NC280iS 8985 (7NMi54M9 h t f

DUKEPOWER July 8, 1992 U.

S.

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

20555

Subject:

-McGuire Nuclear Station, Units 1 and 2 Docket Nos. 50-369 and 50-370 Pump and Valve Inservice Testing (IST) program Relief Request 92-01 Dear Sir;

-Pursuant to 10 CFR 50.55(g)(5)(111), I am submitting the attached relief request for NRC review and approva]

This request for relief from ASME Code jnvolves the recording of stroke test data-requirements for category A and D valves.

The valves.in question are located on the control air headers for the diesel generators.

The valves were not initially identified as being within the scope of our IST: program as defined by IWV-1100.

During our Design Basis Document upgrade program, theso valves were identified as meeting the. scope requirements of IWV-1100 and thus, should have been included in our IST program.

As discussed in the attached,-relief from the ASME Code requirements is requested since thLso valves will be removed during a planned modification and due to the burden associated with complying with all code requirements for this short period of. time.

Your timely review and approval of this-submittal is requested.

Should there be any questions regarding this matter, please contact Paul Gtl.11 at (704) 875-4002.

very truly yours, fYlO/ r Ted C.

McMeekin

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9207270320 920700

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U.-S.

Nuclear Regulatory Commission July;8,-1992 4

- page 2 xc:

with attachment S.

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Ebneter Regional Administrator, Region II P.

K. Van Doorn Senior Resident-Inspector, McGuire T.

A.

Reed, Project Manager ONRR John C.

Brooks, Commissioner of Labor-Attention: Director, Boiler & Pressure Vessel Division Department of Labor State of North Carolina l

4 West Edenton Street Raleigh, North Carolina 27601 l-i-

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7-ATTACHMENT DUKE POWER COMPANY MCGUIRE NUCLEAR STATION Request for Relief From ASME Code Section XI Requirements I.

Component for Which Relief is Requested A.

Name and Identification Number 1,2VGSV5160; 1,2VGSV5161; 1,2VGSV5162; 1,2VGSV5163; 1,2VGSV5170; 1,2VGSV5171; 1,2VGSV5172; 1,2VGSVS173 B.

Function These valves are located on the control air headers of the diesels.

Upon a diesel start signal, these solenoid valves are energized to direct dried, filtered control air to the air / oil booster cylinder, the intercooler temperature controller, and the run/ shutdown cylinder (which allows fuel to the engine). When the engine reaches 95% speed, solenoid valves 1,2VGSV5160; 5161; 5170; and 5171 are de unergized, thereby venting the air supplied to the air /oi1~ booster cylinder and the shuttle valve to atmosphere.

See Attached instrument detal?. schematic (DWG. NO. MC-1499-VG3).

C.

ASME Section XI Code Class Class C D.

Valve Category category B II.

ASME Code Section XI Requirement That Has Been Determined To Be Impractical ASME Code Section XI, 1980 Edition through Winter 1380 addenda, Article IWV-3413(b) and IWV-3414-for measuring the stroke times and the recording of the data.

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III. Basis for.Roquesting-delief Since ene valves in question are solenoid valves, direct observation _of valve disk movement is not practical.

Further, due to limitations of available acoustic emission monitoring equipment, this means of verifying disk movement is not readily available at this time.

Furthermore, during the upcoming refueling outages for both units (EOC-8 refueling outages), the valves in question will be modified such'that they would not fall within the_ scope of IWV-1100..As such, no adverse trends can be. developed from the quarterly full stroke exercise test.

In addition, a diesel start test is performed every month.

If any one of these valves fall to perform its intended function, it_would result in a failure of the diesel to-start.

Conversely, if the diesel does successfully start, _this would indicate that the valves in question performed their intended safety functior..

By_this indirect means, the proper performance of the valves are verified on at least a monthly basis.

Accordingly, since there is no short term practical way of monitoring the valve disk-movement; that in the near future the valves will be. modified in such a manner that-they'no. longer fall within the our IST program; and that the operation of the valves are verified (indirectly) via the monthly diesel start test, relief from the timing requirements-of IWV-3413(b) and the recording requirements of IWV-3414 is requested.

IV.

Alternate Testing As stated above the valves are indirectly tested during Lthe monthly diesel start test.

Any failures of one of the valves in question would result in the diesel failing to start.

V.

Implementation Schedule The. monthly diesel start test will continue to be

-performed and during the EOC-8 refueling outages for both units, the function of these valves will be modified.such that_they are no longer subject to the requirements of IWV-3400.

The EOC-8-refueling outage for unit 1 is scheduled to begin in March, 1993 and for unit:2 to begin June'1993.

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