ML20028D856

Submits Mechanical Equipment Qualification Program for Review & Approval

ML20028D856
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	01/14/1983
From:	Tramm T COMMONWEALTH EDISON CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 8301200022
Download: ML20028D856 (2)

Text

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i w Commonwealth Edison O .,) one Fust National Plaza. Chicago, Illinois

< O Addr:ss Riply to: Post Offica Box 767 Chicago, lilinois 60690

- January 14, 1983

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Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Byron Station Units 1 and 2 Braidwood Station Units 1 and 2 Mechanical Equipment Qualification NRC Docket Nos. 50-454, 50-455, 50-456 and 50-457

Dear Mr. Denton:

This letter will document cur program for the environmental qualification of mechanical equipment at Byron and Braidwood. NRC review and approval is requested.

PROGRAM DESCRIPTION Environmental qualification of mec'hanical equipment is a part of the

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equipment specification and procurement process. The procurement specification for safety related equipment includes operating conditions (both internal and external), accident conditions if applicable, and seismic requirements. The seismic qualification program is a separate effort and is reviewed at the SQRT audit.

Environmental qualification for active mechanical equipment required for safe shutdown of the plant consists of verifying that organic components of the equipment will not be unacceptably degraded because of exposure to harsh environmental conditions. Temperature and radiation are the environmental parameters which are most likely to influence qualification. Examples of components which contain organic materials and may be affected by harsh environments are listed below:

- Gaskets - Spacers

- 0-Rings - Stuffing Boxes

- Diaphragms - Hydraulic Snubber Fluids

- Lubricants - Hydraulic Actuator Fluids O

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a H. R. Denton January 14, 1983 QUALIFICATION METHODS The first method of qualification is by specifications. If the applicable environmental parameters are specified and the vendors have documented their compliance, qualification may be considered complete.

In some instances the equipment may have been procured under a specification which did not envelope the current environmental qualification parameters. This situation can occur because equipment specifications were generally written and equipment ordered 5 to 10 years ago. Calculational methods for environmental parameters, especially radiation levels, have been under revision in the past few years. As a result, parameters may be revised. If the revised parameters are not enveloped by the specification, the organic components are identified and qualification data is researched and documented to establish qualification. This qualification data may be obtained from test or analysis.

In the event that the above approaches do not establish qualifica-tion, operating data will be researched and used as a basis for qualification or for a maintenance and surveillance program.

SUMMARY

The qualification procedure described above is an integral part of the design process. Utilization of the procurement specifications insures that any significant changes in environmental conditions, system design, or component design are identified and the impact on qualification is assessed. As a result, the Byron /Braidwood program meets the requirements of GDC 4 and 10 CFR 50 Appendix B and provides assurar.ce of equipment operability for safe plant operation.

We understand that the NRC will select a few components for audit of the qualification information established in this program.

Please direct any questions regarding this matter to this One signed original and fifteen copies of this letter are provided for your use.

l Very truly, ouyg,

[h- , '

// T . IR Tramm Nuclear Licensing Administrator 1m 580lN

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