ML20134H009

Part 21 Rept Re Micro Instrument Corp Design Error When Upgrading Auxiliary Bldg Main Hoist Backup Hydraulic Brake Sys.Design Mod Incorporated Hydraulic Valve Which Prevented Hydraulic Pressure Release & Backup Brake Engagement

ML20134H009
Person / Time
Site:	Ginna
Issue date:	08/23/1985
From:	Kober R ROCHESTER GAS & ELECTRIC CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
REF-PT21-85-379-000 PT21-85-379, PT21-85-379-000, NUDOCS 8508280194
Download: ML20134H009 (6)

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ROCHESTER GAS AND ELECTRIC CORPORATION e 89 EAST AVENUE, ROCHESTER, N.Y. 14649-0001 % )

e y v r t t e.4o% c rizcmc e STEAM PRODUCTMW A#E A COCE M6 546 2700 August 23, 1985 ,

Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555

SUBJECT:

10CFR21 Report R. E. Ginna Nuclear Power Plant Docket No. 50-244

Dear Sir:

The enclosed transmittal is to provide notification of a design error made when upgrading the Auxiliary Building Main Hoist Backup Hydraulic Brake System. The Micro Instrument Corporation modified the conceptual design, prepared by National Machine Company, and submitted to them by Rochester Gas and Electric Corporation. The hydraulic valve required by design prevented the release of hydraulic pressure, thereby preventing the backup brakes from engaging. Testing of the system detected this error and the hydraulic valve was replaced with one of proper design.

Retesting verified proper operation of the system.

Ve truly yours, Roger W. Kober .

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A-61:5 4 controlled Copy #4 Refer to A-61 for Instructions FORM 1 10CFR21 EVALUATION FORM Hydraulic and Electrical System for Main 1.- Statement of Problem:

Hoist hydraulic disc brakes not designed properly to meet intended fun',t i on .

2.

References:

Nonconformance Report G85-137. G85-140, G85-143, G85-147

3. Basic ComDonent: Defined in ADDendix "A". Sten A.1

a. Determination of basic component NO has been made by the issuance of an'"N" purchase order or Q.A. Requisition that determines the purchase be made under 10CFR21 -

Applicability.

NOTE: If 3.a, was marked "YES" proceed to Item 4 below.

If 3.a was marked "NO" DO NOT proceed any further, does not meet 10CFR21 Evaluation Criteria.

4. Potential Defect in Basic ConDonent IF:

a. Either the defect must exist in NO a delivered component, or

b. The defective component must have NO been installed, used or operated or ,

c. In case of onsite work or software, YES the deviation was associated with .

a portion of the facility offered

for acceptance, or

d. The conditions of the potential YES defective component could have

' contributed to exceeding a safety limit, or

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A-61:6 Refer to A-61 for Instructions FORM 1 (con't) ,

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e. Other: DESIGN (Design, inspection, testing, consulting services, in which a defect or failure could create a substantial safety hazard.)

NOTE: If either 4.a, 4.b, 4.c, 4.d, or 4.e was marked "YES", proceed to Item 5 below. If all five items were marked "NO", DO NOT proceed any further, does not meet 10 CFR 21 Evaluation Criteria.

5. Consideration Whether Defect Could Create a Substantial Safety Hazard Discussion: MICRO INSTRUMENT CORP. MODIFIED THE CONCEPTUAL DESIGN PREPARED BY NATIONAL MACHINE COMPANY AND SUBMITTED TO THEM BY RG&E. MISAPPLICATION HAS REQUIRED REPLACEMENT OF ONE HYDRAULIC VALVE. THE VALVE WOULD NOT RELEASE HYDRAULIC PRESSURE PREVENTING THE BRAKES TO ENGAGE. RG&E AND MICRO INSTRUMENT CORP. ARE REVIEWING THE DESIGN.

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6.

Conclusion:

10 CFR 21 Reportable YES l3l NO l[l Signed: hs/ h / h/

Responsible Engineer Date:7-/f- JW Reviewed: O 'z I - 85 PORC Date Approved: $144 Date:3-22iff Superintendent

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A-61:7 Controlled copy #4 Refer to A-61 for Instructions FORM 2 ,

CONTENT OF TRANSMITTAL TO NRC Date: 8-22-85

1. .NAME: Mr_ Rocer W. Kober TITLE: Vice President Flectric r, Staam Production ADDRESS: Rochester Gas & Electric 89 East Avenue Rochester. NY 14649

2. FACILITY: R.E. Ginna Nuclear Power Station DOCKET NO.: 50-244

3. Activity, or basic component supplied which fails to comply or contains a defect: mhn an n i ern fne i- w o w m ,,te,,7 wiran,,lic brake system for the Auxiliary Building main hoist.

4. Firn supplying the basic component which fails to comply or contains a defect: Micro Instrument Coro.

5. Nature of the defect or failure to comply and the safety hazard which is created or could be created by such a defect or failure to comply: Misapplication of a hydraulic valve would prevent backup brake from engaging.

-- 6. Date on which the information of such defect or failure to comply was obtained: 7-1-85

7. In the case of a basic component which contains a defect or fails to comply, the number and locations of all such compon-ents in use at, supplied for, or being supplied at Ginna Station:

NUMBER: One LOCATIONS: Auxiliary Buildina Main Hoist

a A-61:8 Refer to A-61 for Instructions FORM 2 (con't)

8. Corrective Action which has been, is being, or will be taken:

Replacement valve obtained, installed and functionally tested.

Design review by RG&E and Micro Instrument Corp. determined no additional misapplications. Additional training to insure supplier 8.1 Name h dual or organization responsible for the action:

Ginna Modification Project Group 8.2 Length of time that has been or will be taken to complete the action: Actions associated with the crane hydraulic system installation testing and design review were completed by Auoust 1. 1985.

Training activities will be completed by October 1, 1985.

9. Any advice related to the defect or failure to comply about the facility, activity, or basic component that has been, is being, or will be given to Rochester Gas and Electric:

None NOTE: Notification is not required if individual has actual knowledge that the NRC has been adequately informed of such defect or such failure to comply.

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Initial notification shall be made within two days j following receipt of the information. If initial l

notification is by means other than written communica- ,

i tion a written report shall be submitted within five days after the information is obtained.

Notification shall be made to:

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1. Director, Office of Inspection and Enforcement, j

or to

2. Director of Regional Office

! Three copies of each report shall be submitted to the Director, Office of Inspection and Enforcement.

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'8. Corrective Action...(cont'd) f adherence to purchase order-requirements is being scheduled.

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