ML20070E759

From kanterella
Jump to navigation Jump to search
Clarifies 821110 Statements Re Seismic Qualification of Turbine Bldg.Recommendation for Independent Analysis by BNL Justified.Transmittal of Clarifications to Other Commissioners Requested
ML20070E759
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 11/15/1982
From: Roesset J
ROESSET, J.M.
To: Palladino N
NRC COMMISSION (OCM)
Shared Package
ML20070E753 List:
References
NUDOCS 8212170378
Download: ML20070E759 (1)


Text

. S $ .l 0 _~.? . l' W *4;f l"?'; -) l9- $ $p)

. Y h $ Y.'__'l' .

7. -N wE ?;T?ig:.'

JOS M. ROSSSET. Sc.D CONSULTING ENGINEER

/ 3506 DUVAL ROAD AUSTIN. TEMAS. U S A. 78789 4

. , - i s i n ..... n gy;[-

Chairman Nunzio Palladino Nuclear Regulatory Commission Washington, D.C. 20555

Dear Chairman Palladino:

In my statement in front of the Commission on November 10 I indicated that since the turbine building of the Diablo Canyon Nuclear Power Plant was a class 1 structure, an unusual classi-fication, and since it had undergone extensive modifications, making it a rather complex structure, it would be desirable tof have an independent analysis conducted by Brookhaven National -

Laboratories. I was informed after the meeting that the turbine -

building is not a class 1 structure but that it contains class 1 equipment and was therefore redesigned for the Hosgri earthquake *.

While my statement was inaccurate in relation to the classifica-tion of the building, since a seismic design for Hosgri is required. I believe my recommendation is still valid.

f. '

I expressed also concern about the fact that the redesign is being done at present with spectra that are apparently incorrect. I was referring specifically to the annulus structure.

For the other buildings the spectra which are being used may not be incorrect although their validity is still in doubt.

I would greatly appreciate your transmitting these clarifi-cations to the other commissioners. With many thanks, Sincerely yours, Jose M. Roesset JMR:jtb

  • NRC Staff Safety Evaluation Report. Supplement 7 - page 3 - 1.

(May 1978) 8212170378 821208 PDR COMMS NRCC CORRESPONDENCE PDR

,1 y ;-3 > . -; ; . .s.y .. . . . . . p.. . , - . . . . ..y . .- .~ r . . - ,:. i;, .

.~~----~~~~~'"~~~~"~(("

- . . , ~ ,

,, 4\t4 74 ,

, - .% _,_, ,j y

9 PM 4~

_m, _ p -- -

m.

JOS$ M. RO@SSET. Sc.D. g5 N(V g3 s

3506 DUVAL ROAD AUSTIN. TEM AS 78700 h U.S A. m L:sA _ <

20E

'l f

. I

' f

.- t, Chairman Nunzio Palladino Nuclear Regulatory Commission Washington, D. C. 20555 i  !

l  !

.~.~~~r~

. , - . ,,.ysiv.. < * ~

t

- . . - . . .