ML20154D297

Requests Exemption from Requirements of 10CFR50.49(f) Re Environ Qualification of Bunker Ramo Penetrations.Exemption Will Allow Full Power Licensing to Proceed

ML20154D297
Person / Time
Site:	Braidwood
Issue date:	05/11/1988
From:	Hunsader S COMMONWEALTH EDISON CO.
To:	Murley T Office of Nuclear Reactor Regulation
References
4618K, NUDOCS 8805190139
Download: ML20154D297 (2)

Text

'- _ 'x Commonwealth Edison One Fr1 Na*onal Plan Chcago. Anos l

~~

]

Address TlepTiioTPo7C6cIBoT767~

i o

1 N_ ' Chcago, llhnors 60690 0767 May 11, 1988 Mr. T. E. Murley Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC. 20555 Attn: Document Control Desk Subj?ct: Braidwood Unit 2 Environmental Qualification Bunker Ramo Penetration NRC Docket No. 50-457

Reference:

(a) April 8, 1988 D.R. Muller letter to L.D. Butterfield (b) April 7, 1988 S.C. Hunsader letter to T.E. Murley (c) April 15, 1988 F.G. Lentine letter to T.E. Murley (d) May 5, 1988 C. Reed letter to T.E. Murley

Dear Mr. Hurley:

Reference (a) documented the NRC staff's previously established conclusion that the environmental qualification for the Bunker Ramo Instrumentation penetration assembly installed in Braidwcod Unit 2 had not been demonstrated to their satisfaction.

The NRC staff presented in reference (a), that during the Midland Containment Penetration Environment Qualification (EQ) Test, Insulation Resistance (IR) readings had not been tcken at frequencies consistent with IEEE Standard 323-1974.

Reference (b) provided Commonwealth Edison's (Edison) initial request for a temporary exemption from the requirements of 10CFR 50.49)(j) as applied to these penetrations, (because Edison believes that appropriate supporting documentation can be obtained to address the NRC staff's concerns). References (c) and (d) provided additional information in support of that request.

Because the NRC staff has taken the position that the Dunker Ramo penetration environmental qualification has not been demonstrated, they have not been able to establish the acceptability of an exemption to 10CFR 50.49(j). Though Edison believes that ICCFR 50.49(j) is the applicable part of the regulation from which to seek an exemption, the current circumstances necessary to obtain NRC staff acceptance lead us to request a temporary exemption from 10CFR 50.49(f) in order to allow for the full power licensing of Braidwood Unit 2 to prcceed.

The duration of this exemption would be in

/

Ak 8805190139 890511 09 PDR ADOCK 05000457 i

i

()

P DCD t

1

s.'?

i i

4

. [

+

)

i

)

accordance with the same dates and schedules previously described in l

references (b), (c), and (d). The technical justifications previously submitted in these references equally apply.

Edison intends to continue its efforts to obtain documented information that supports the environmental l

qualification of this component.

J Please address any questions concerning this matter to this office.

)

Very truly yours, a

i

(. l;/f_._____k i

j S. C. Hunsader Wuclear Licensing Administrator i

/klj l

cc:

S. Sands (NRR)

A. B. Davis (RIII)

I l

Braidwood Resident Inspector i

4618K I

j a

d k

I 1

[

i 1

i J

I i

i j

I I

I l

f t

1 f

4 i

__