ML20052C960
| ML20052C960 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 04/15/1982 |
| From: | Deyoung R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20052C945 | List: |
| References | |
| NUDOCS 8205060140 | |
| Download: ML20052C960 (3) | |
Text
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o f[gR Mty og UNITED STATES NUCLEAR REGULATORY COMMISSION a
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WASHINGTON. D. C. 20555
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Apg 151932 Docket No. 50-373/374 f!EMORAf1DUM FOR:
Harold R. Denton, Director Office of Nuclear Reactor Regulation FR0ft:
Richard C. DeYoung, Director Office of Inspection and Enforcement
SUBJECT:
RESULTS OF INDEPEriDENT ASSESSMENT OF ALLEGATIONS SY T. FAHNER, ESQ., REGARDING THE LASALLE STATION OFF-GAS FILTER BUILDING As discussed in our conference call with Messrs. Case, Stello and Keppler on t' arch 29,1982, IE accepted responsibility for certain actions necessary to respond to the March 24, 1982 filing by T. Fahner, Esq., Attorney General, State of Illinois. Specifically, IE was to conduct an independent assessment of actions taken by RIII on the issues related to the off-gas filter building and to independently assess the allegations related to the off-gas filter building structural adequacy.
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We have completed both aspects of this assessment, the details of which are contained in two separate reports. Enclosure 1 (Inquiry and Assessment of RIII Actions) will not be finalized until April 16 but its basic conclusions are reflected in this memorandum. You will be provided a copy upon completion. These reports were prepared or. the basis of documentation review, interviews, field measurements and field observations.
Our conclusions as a result of this independent effort are as follows:
1.
Region III followed a logical course of action in responding to the allegations related to the off-gas filter building. They first determined whether the allegations pertained to safety related structures, systems or components. This was completed,using the reference document of the Safety Analysis Report plus the expertise of RIII staff in BWR plant systems including the off-gas system. Since 4
the allegations were found to relate to'non-safety items, no further action was taken. Our independent assessment is that the allegations did not require additional RIII follow-up. This is due to the fact that the off-gas filter building is a non-safety related building which contains systems and equipment which have no function in preventing or mitigating accidents or accident conditions.
l CONTACT:
R. E. Shewmaker, IE 49-29678 8205060140 820417 PDR ADOCK 05000373 P
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Harold R. Denton ApR 151982 i
Further it was noted during this assessment that when RIII became i
aware of the allegation of the cutting of reinforcing steel in safety-related structures, prompt action was taken by the investigator to alert his supervision which, in turn, alerted the RIII engineering Currently, RIII is working on this matter in conjunction with NRR.
group.
2.
The reinforced concrete roof of the off-gas filter building has slight 4
deviations from the thickness of the 12-inch thick slab as specified by i
the design drawings. -The range of deviations of +1-1/4" and -13/16" will have no significant effect on structural behavior.
3.
The loading imposed by the temporary construction related transformer on the roof of the off-gas filter building did not exceed the design loads and did not cause structural damage.
4 The current condition of the roof of the off-gas filter building, which includes existing cracks, embedments, anchor bolts and nicked reinforcing i
steel, is acceptable.
There is every reason to expect that the roof system can fully carry the design live load of 100 psf and remain in a serviceable condition while performing its intended function over its service life.
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If there are any questions on this assessment and its related details, my
'I staff and I will discuss them with you.
We are maintaining the various documents which support this assessment and its conclusions.
Richard C.
Young,! rector i
~-
Office of spection and Enforcement i
Enclosures:
1.
Incuiry and Assessment of RIII Actions i
2.
Assessment of Off-Gas Filter Building cc w/ enclosures: See page 3 1
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i Harold R. Denton APR 151982 i
i' cc w/ enclosures:
J. !!. Sniezek, IE E. L. Jordan, IE
. R. Fortuna, IE D. G.'Eisenhut HRR R
A. Purple, NRR
. Schwencer, NRR R. H. Vollmer, NRR J. G. Keppler, RIII R. L. Tedesco, NRR
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