ML20135E032

Clarifies 850621 Response to SER Open Items 3.9.3.2,3.10 & 3.11.Simple Summation of Total Components Exhibiting Plant Uniqueness Misleading Indicator of Magnitude of Differences & Should Not Be Used

ML20135E032
Person / Time
Site:	Braidwood
Issue date:	09/11/1985
From:	Miosi A COMMONWEALTH EDISON CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
0628K, 628K, NUDOCS 8509160262
Download: ML20135E032 (5)

Text

.-

\\ Commonwarith Edison

) one First National Plaza, Chicago. lilinois O

O" Address Reply to: Post Othee Box 767 Chicago, Illinois 60690 September 11, 1985 i

l Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation i

U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Braidwood Station Units 1 and 2 Supplemental Information for SER Open Items 3.9.3.2, 3.10 and 3.11 NRC-Docket Nos. 50-456 and 50-457 7

Reference (a):

June 21, 1985 A.D. Miosi Letter to H.R. Denton

Dear Mr. Denton:

l The original response was transmitted to you by reference (a).-

This letter provides additional clarification in response to telecon questions from Jan Stevens and Arnold Lee of the Nuclear Reactor Regulation.

i For clarification and consistency some previous communications are reiterated.

1.

Greater than 99% of the Braidwood components are identical to Byron components.

2.

Document " Seismic and Dynamic Qualification Summary and Status of Equipment Important to Safety" docket Nos:

STN 50-454 and 50-455 is applicable.

3.

Of the (165) pages in this document only pages 29, 30, 32, 94, 98, 101, 111, 121, 123, and 140 identify items that have some uniqueness for Braidwood.

4.

A simple summation of the total components that exhibit Braidwood uniqueness is a misleading indicator of the magnitude of dif ferences and'should

-not be used.

Only three types of active components are different.

These are addressed in statement seven.

1 hMl A N 05000456 E

PM y

Page 2 5.

1/2" and 3/4" valves are listed on other CECO.

documents.

To maintain consistency they are also identified'in the (165) page seismic and dynamic qualification document.

The only requirement for these valves is to demonstrate that the valve body is 110% of the strength of the attached pipe per ASME Section III NC/ND-3520 since these valves do not have extended portions and are not active.

This analysis was completed as part of the piping analysis and could have been omitted from the seismic and dynamic qualification document.

Information on pages 29, 30,32, 98, 111, and 123 is in this category, and could have been omitted from the subject report.

Qualification analysis were available at Byron for pages 29, 32, 98, 111 and 123.

6.

The valves on page 94 were identified unique to Braidwood because the identical Byron valves have been deleted.

These subject valves have now also been deleted at Braidwood.

7.

Only components on three pages are unique to Braidwood because of physical characteristics.

These components are identified on pages 101, 121, and 140.

Page 121 identifies manual normally open non-active valves.

Page 101 loentifies one 2" active valve and page 140 identifies four instruments.

Attached A provides supporting documentation for components referenced in this letter.

Please address any questions you or your staff may have concerning this matter to this office.

Included in this response is one signed original with (15) fifteen copies.

Very truly yours, h

A.

D. Miosi Nuclear Licensing Administrator

/klj 0628K l

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Page 3 ATTACHMENT ~A Page 29 1+2CS055A+B,-l+2CS056A+B, 1+2CS057A+B At Byron the valves performing this function are Westinghouse supplied valves with a different tag number.

The BRW valves are lighter and were utilized in order to simplify the piping support system.

The report qualifying these valves is also.used to qualify Byron valves of this type and was-available for Byron SQRT audit.

For these valves which do not have extended portions and are not active, the only requirement to be. met is ASME Section III NC/ND-3520.

That is, demonstrate that the valve is 110% the strength of the attached piping.

t Page-30 1+2CV8359A-thru-D At Byron these valves were supplied by Westinghouse.

These valves are in-line check valves and are non-Active.

For these valves which do not have extended portions and are not active, the only requirement to be met is ASME Section III NC/ND-3520.

That is, demonstrate that the valve is 110% the strength of the attached piping.

Page 32 1+2CV053A+B At Byron the valves performing this function are Westinghouse supplied valves with a different tag number.

The BRW valves are lighter and were utilized in order to simplify the piping support system.

The report qualifying these valves is also used to qualify Byron valves of this type and was available for Byron SQRT. audit.

For these valves which do not have extended portions and are not active, the only requirement to be. met is ASME-Section III NC/ND-3520.

That is, demonstrate that the valve is 110% the strength of the : attached piping,

Page 4 Page 94 1+2RC002A thru C, F thruH These valves were deleted at Byron and have now been deleted at Braidwood.

These valves were too heavy and were replaced by 1+2RCO20A-H.

Hence, they should be deleted from the SQRT list.

Page-98 1+2RH020A+B, l+2RH021A+B, 1+2RH022A+B, 1+2RH023A+B At Byron the valves performing this function are Westinghouse supplied valves with a dif ferent tag number.

The BRW valves are 7

lighter and were utilized in order to simplify the piping support system.

The report qualifying these valves is also used to qualify Byron valves of this type and was available for Byron SQRT audit.

For these valves which do not have extended portions and are not active, the only requirement to be met is ASME Section III NC/ND-3520.

That is, demonstrate that the valve is 110% the strength of the attached piping.

I Page-101-2RY8000A This valve was originally a Westinghouse valve that was transferred to Quad Cities Station during an outage.

The replacement valve was purchased from Borg-Warner.

Page 111 1+2SIO20A-D, 1+2SIO21A-D, 1+2SIO27A-D 1+2SIO28A+B, 1+2SIO29A+B, -l+2SIO30 A+B, l+2SIO31 A+B -

l l

At Byron the valves performing this function are Westinghouse i

supplied valves with a different tag number.

The BRW valves are lighter and were utilized in order to simplify the piping support system.

~he report qualifying these valves is also used to qualify Byron valves of this type and was available for Byron SQRT audit.

For these valves which do not have extended portions and are not

-active, the only requirement to be met is ASME Section III NC/ND-3520.

That is, demonstrate that the valve is 110% the strength of the attached piping.

Page-121 OSX115A-F These valves in the Lake Screenhouse are unique to Braidwood.

These manual valves are normally open and are provided for pipe i

line maintenance purposes.

U

,,e-,.

r Page 5 Page-123 l+2SX2185A A large number of. ' extra' safety-related valves were purchased under Specification F/L-2918.

These have since been dedicated for use as 1+2SX2185A at Byron and at Braidwood.

The report qualifying these valves. is also used to qualify Byron valves of this type and was available for Byron SQRT audit.

For these valves which do not have extended portions and are not active, the only requirement to be met is ASME Section III NC/ND-3520.

That is, demonstrate that the valve is 110% the strength of the attached piping.

Page 140 OTX-VC063A&B, OTX-VC064A&B Circulation Heaters and Chlorine Detectors These are unique to Braidwood due to the plant's proximity to railroad tracks.

Current status is that the detectors are qualified and the qualification for the heater is under review.

0628K