ML20052F145
| ML20052F145 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 04/23/1982 |
| From: | Burstein S WISCONSIN ELECTRIC POWER CO. |
| To: | Clark R, Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19274C070 | List: |
| References | |
| NUDOCS 8205120162 | |
| Download: ML20052F145 (2) | |
Text
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W.ITHHOLD FROM PUBLIC DISCLOSURE
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CONTALNS l'0 CFR 2.790 MATERIAL
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g April 23, 1 v
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4 l ",. 's Mr. H.
R.
Denton, Director Office of Nuclear Reactor Regulation U.
S. NUCLEAR REGULATORY COMMISSION Washington, D. C.
20555 Attention:
Mr.
R. A. Clark, Chief Operating Reactors, Branch 3 Gentlemen:
DOCKET NOS. 50-266 AND 50-301 1
STEAM GENERATOR SLEEVING PROGRAM POINT BEACH NUCLEAR PLANT, UNITS 1 AND 2 This is to provide information requested verbally by Mr. Colburn of your staff regarding radiation exposure estimates for installation of cleeves in steam generator tubes as described in Figure 8.6-1 of the Point Beach Steam Generator Sleeving Report, WCAP-9960, Revision 1 (Reprint), (Proprietary)
(" Sleeving Report").
A copy of this figure is provided as Attachment 1.
The estimated exposures in Attachment 1 are based upon the use of semi-remote equipment for. installation of sleeves and equipment and processes described in the Sleeving Report.
Initial dose rates are conservatively assumed to be 30 Rem /hr in the channel head, 12 Rem /hr at the channel head manway, and 3 Rem /hr in general platform areas around the channel head.
Estimates of radiation exposure per sleeve installed are based'upon estimated personnel occupancy times in the channel head and adjacent areas during sleeving installation.
With the semi-remote equipment, it is estimated that [
la,c,e of channel head time is required l
per sleeve.
Approximately [
la,c,e and [
la,c,e per sleeve are required in the manway and platform areas, respectively.
This results in an estimated radiation exposure per sleeve of
[
la,c,e person-rem, assuming no decontamination of the steam generator channel head prior to sleeving.
This exposure estimate is the basis for the upper curve in Attachment 1.
Other exposure estimates are calculated by applying various channel head decontami-nation factors to this value.
{h40 /
1 0I C205120162 820423 PDR ADOCK 05000266 P
a.
i Mr. H. R. Denton April 23, 1982 Radiation exposures for other activities associated with the sleeving program, such as decontamination of the steam generator channel head, are provided in Table 3 of the sleeving demonstration program summary report which was submitted by our letter dated January 25, 1982.
This letter and attachment contain information which is proprietary to Westinghouse Electric Corporation.
In conformance with the requirements of 10 CFR 2.790 of the Commission's regula-tions, we request that the information contained within brackets be withheld from public disclosure.
Included with the transmittal of the original Sleeving Report, dated September 28, 1981, was an i
application for withholding such information from public disclosure and an affidavit from Westinghouse Electric Corporation in support of that application.
That affidavit sets forth the basis on which the bracketed information should be withheld from public disclosure.
We shall be pleased to respond to any questions you may have regarding this information.
Very truly yours, W
n t/J U
d Executive Vice President Sol Burstein Attachment Copies to NRC Resident Inspector ASLB Service List i
i e
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