ML17252B421
| ML17252B421 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 06/23/1976 |
| From: | Bolger R Commonwealth Edison Co |
| To: | Rusche B Office of Nuclear Reactor Regulation |
| References | |
| Download: ML17252B421 (2) | |
Text
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Commonwe. Edison One First Nation laza, Chicago, Illinois Address Reply to: Post Office Box 767 Chicago, Illinois 60690 June 23, 1976 r 1R\\egu1atofy ~o~§! Jlf~..
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Benard c ~ Rusche, **Director
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NUclear
- ReactC?r -Regulation ar Regulatory Conunission Reference (a) :
Dear Mr. Rusche:
20555 Dresden Nuclear Power Station Units 2 and 3 Propc)sed Amendment to Appendix A Techtjical Specifications of Facility Operating Licenses DPR-19 and DPR-25 NRC Docket Nos. 50-237 and 50;..249 Dresden Special Report 39, Supplement 1 Combusti~le Gas control System Design Report.
NRC Docket Nos. 50~237 and 50-249.
Pursuant to 10 cFR-50~59~ conunonwealthEdison Company*
proposes.to amend te.chnical specification Appendix A to facility operating licenses DPR-19 and DPR-25.
The purgese-.of the amendment
..,is to eliminate the requirement _to* inert the. containment* *... The
- proposed_amen&Uents are-indicated on enclosed.pages 115, 117,.117a,
.__Al7b,'126a,*and 127~ Reference (a) as ainended Febru~ry 26, 1976,
.. *is* the basi.s for this amendment *. The analysis.contained in Reference (a) demOnst;-ates that the. quantity of metal-water reaction calculated for a loss of:coolant accident (LOCA) in accordanc:;e:with 10 CFR 50.46 ~~d. 10 <:;FR so.
Appendix_K_will not generate*- sufficient hydrogen to create.a flammable mixture in the primary contaimiient.
In the* unlikely event of a LOCA, the standby gas treatment system is avail:able.* to purge the containment in order to maintain the atmospheric concentration of hydrogen below the flanunability threshhold.
While special Report ~~ demonstrates that the nitrogen environment is not necessary for plant safety, the presence of the nitrogen environment inhibits the.ability of Operations Department to examine the primary plant in order to quantify operational problems.
Of greater significance is the personnel hazard associated with entering a containment which has been inerted.
The personnel hazard is the most compelling reason for an expeditiou~ el~qation of the inerting requirement.
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Mr. Benard c. Rusche June 23,. 1976 This amendment has received off site and on site approva~_
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Three (3) signed originals and thirty seven (37) copies are provided for.your use.
SUBSCRIBED_and SWORN to before,me-.tnis ~day
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Enclosures:
40 copies amended l26a, 127.
40.copies amen4ed 126a, 127.
Very truly yours, ft!~
Assistant Vice President pages DPR-19 115, li7, 117a,. 117b, pages DPR-25 115I,117 I.ll7a, ll7b,