ML20078N864

Forwards Probability of Detection by Bobbin Insp & WCAP14273, Technical Support for Alternate Plugging Criteria W/Tube Expansion at Tube Support Plate Intersections.... WCAP14273 Withheld

ML20078N864
Person / Time
Site:	Byron, Braidwood
Issue date:	02/07/1995
From:	Saccomando D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML19311B753	List: ML20078N864 ML20078P151 ML20078P155
References
NUDOCS 9502160162
Download: ML20078N864 (2)

Text

e ) OwnmonwIshh 1400 0 pus Place Edison  !

7 Downers Grove, lilinds 60515 February 7, 1995 U. S. Nuclear Regulatory Commission Washington, D.C. 20555 l Attn: Document Control Desk l l

Subject:

Probability of Detection Versus Voltage Correlation  !

Report and Final WCAP Regarding Application for Increase in  ;

Interim Plugging Criteria for ,

Byron and Braidwood Unit 1

• NRC Docket Numbers 50-454 and 50-456

Reference:

D. Saccomando letter to NRC dated January 28, 1995, transmitting the Preliminary Technical  ;

Report regarding Application for Increase in ,

Interim Plugging Criteria for Byron and Braidwood !

Stations The Reference letter transmitted the Preliminary Report

" Technical Support for Alternate Plugging Criteria with Tube  ;

Expansion at Tube Support Plate Intersections for Model D4 Steam  !

Generators," and " Probability of Detection Versus Voltage  !

Correlation." Both of these documents will be used as the technical basis in upcoming Byron and Braidwood Station's l proposed technical specification amendments regarding an increase  !

in the Interim Plugging Crfteria (IPC) for the Unit 1 steam l generators. .

I Since the January 28, 1995, transmittal, slight changes have been  :

made to the " Probability of Detection Versus Voltage i Correlation." i i

Bar charts have been reformatted to improve clarification of  !

information.

Section 5.6 has been revised to indicate a 95% confidence  !

level dual analyst probability of detection curve.  !

This attached report is being reissued under the date of February 6, 1995.

Additionally, Preliminary Report " Technical Support for Alternate Plugging Criteria with Tube Expansion at Tube Support Plate ,

Intersections for Model D4 Steam Generators," has been finalized  !

since it was initially transmitted and is being issued as WCAP-  !

14273, " Technical Support for Alternative Plugging Criteria with l Tube Expansion at Tube Support Plate intersections for Byron and ,

Braidwood Unit 1 Model D-4 Steam Generators (Proprietary)."  ;

1 kinia\bw\tbexwcap po\

9502160162 950207 PDR i

s}

P ADOCK 05000454 PDR l

^

w NRC Document Control Desk February 7, 1995 Please note that WCAP-14273 contains information proprietary to Westinghouse Electric Corporation, and is supported by the attached affidavit signed by Westinghouse, the owner of the information. The affidavit sets forth the basis on which the information may be withheld from public disclosure by the Commission and addresses with specificity the considerations listed in paragraph (b)(4) of Section 2.790 of the Commission's regulations. Accordingly, it is respectfully requested that the information which is proprietary to Westinghouse be withheld from public disclosure in accordance with 10 CFR 2.790 of the Commission's regulations.

Correspondence with respect to the proprietary aspects of the items listed above or supporting Westinghouse affidavit should reference CAW-95-778 and should be addressed to N.J. Liparulo, Manager of Nuclear Safety & Regulatory Activities, Westinghouse Electric Corporation, P.O. Box 355, Pittsburgh, Pennsylvania 15230-0355.

Please address any questions to this office.

Sincerely,

'3, .

n &

Denise M. Sacdomando Nuclear Licensing Administrator Attachments cc: D. Lynch, Senior Project Manager-NRR R. Assa, Braidwood Project Manager-NRR G. Dick, Byron Project Manager-NRR S. DuPont, Senior Resident Inspector-Braidwood H. Peterson, Senior Resident Inspector-Byron J. Martin, Regional Administrator-RIII Office of Nuclear Safety-IDNS k t nla \tv \tbexwcap A