05000302/LER-1995-001, Forwards LER 95-001-00.LER Delayed Due to Util Evaluation of Design/Licensing Basis of Habitability Envelope

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Forwards LER 95-001-00.LER Delayed Due to Util Evaluation of Design/Licensing Basis of Habitability Envelope
ML20081B309
Person / Time
Site: Crystal River Duke Energy icon.png
Issue date: 03/07/1995
From: Boldt G
FLORIDA POWER CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20081B311 List:
References
3F0395-08, 3F395-8, NUDOCS 9503160128
Download: ML20081B309 (2)


LER-2095-001, Forwards LER 95-001-00.LER Delayed Due to Util Evaluation of Design/Licensing Basis of Habitability Envelope
Event date:
Report date:
3022095001R00 - NRC Website

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s Florida Power CORPORATION oyeest Feuw una a tkdat Na Baao2 March 7, 1995 3F0395-08 .

U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555

Subject:

Licensee Event Report (LER) 95-001-(

Dear Sir:

Enclosed is Licensee Event Report (LER) 95-001-00 which is submitted in accordance with 10 CFR 50.73.

Florida Power Corporation (FPC) Crystal River Unit 3 would like to inform the Staff of the reasons for the delay in submission of this LER. Both FPC and the NRC have been actively trying to better define the design / licensing basis of the habitability envelope especially as it relates to the amount of margin "available" in the design calculations. This margin forms the basis for allowed levels of degradation in the various envelope penetrations.

We are attempting to carefully reconstruct the information relied upon by the NRC Staff in the closure of the generic issue (NUREG-0737 Item III.D.3.4) as well as the best information on the size of openings already accounted for in door testing and other related activities. Our goal is to reduce operator burden and assure an envelope design that can be effectively maintained while we continue to assure control room habitability. It may turn out that the observed dtgradation is within the design basis of the plant. Further, we are evaluating various calculational and design alternatives for both radiation dose as well as toxic gas potential. These may include challenging standard assumptions, reliance upon recent Source Term information and other analytical details.

150097 CMSTAL nNER ENERGY COMPLEX: 15760 W Power Une St . Crystal Rim, Donda 344284708 AMPwhm

@04) 7954406 f

9503160128 DR 950307 ADOCK 0500 2 / g{

f.'a.;.

U'.iS. Nuclear Regulatory' Commission' '

-3F0395-08 x Page:2 of 2-

' ~

~ FPC believed:theIdelay;was necessary.to provide' a' meaningful LER. Should FPC's

" current evaluation determine that the' current event is n'ot legally reportable we:

will rescind LER 95-001-00, but we willistill provide sufficient information to.

. clarify the. issue- and to"close the related Unresolved Item'95-02-02.;

In the~ future, we'will file an appropriate LER_(noting _its potential to' rescind or be supplemented)1 within the 30 day Llimit. Our response to NOV.94-27 will address.this more~ fully.

Sincerely,

~~

G. L.' oldt Vice President .. '

Nuclear. Production j .

GLB/KRW:ff- 'f ,

.xc: Regional Administrator, Region 11 Project Manager, NRR Senior Resident Inspector .

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