ML20147D057
| ML20147D057 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 09/25/1978 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Brian Lee COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 7810130217 | |
| Download: ML20147D057 (2) | |
See also: IR 05000456/1978006
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NUCLEAR REGULATORY COMMISSION
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CLEN ELLYN, ILLINOIS 60137
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September 25, 1978
Docket No. 50-456
Docket No. 50-457
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Commonwealth Edison Company
ATTN:
Mr. Byron Lee, Jr.
Vice President
P. O. Box 767
Chicago, IL 60690
Gentlemen:
.
This will acknowledge receipt of your letter dated September 7, 1978,
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which was submitt,ed in respons2 to the items of noncompliance identi-
fied in our letter dated August 7, 1978, and IE Inspection Report
Nos. 50-456/78-06 and 50-457/78-06.
Your letter has been reviewed, and particular attention was given to
the additional information presented, as well as your request that we
reevaluate these items.
Our position remains that these items are
considered items of noncompliance and, as such, we do not consider
the actions delineated in your letter for Items A.1 and A.3 to be fully
responsive.
With respect to Item A.2, your actions were reviewed on September 14,
1978, during a routine inspection at the Braidwood site. The tendon
bearing plates and trumplets in both Units 1 and 2 are now being
maintained in accordance with requirements and, therefore, we have no
further questions on this item.
With respect to Item A.1, we do not agree that sieves can be catego-
rized with rulers and tape measures as in ANSI N45.2, Section 13.
Our position is that sieves, like C-109 cube molds, unit weight
buckets, thermometers, slump cones, and sand cone density apparatus,
are measuring and test devices used in activities affecting the
quality of Category 1 concrete and, as such, measures are required
to be established to assure that these devices are properly controlled
and calibrated at specified periods to maintain accuracy within
necessary limits, as set forth in 10 CFR 50, Appendix B, Criterion
XII. Your response for this item provided appropriate corrective
action for the sieves in question; however, it did not include the
necessary corrective action to assure conformance with 10 CFR 50,
Appendix B, Criterion XII, as previously described.
Specifically,
we require that sieves, which are u'ed for acceptance of materials
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Commonwealth Edison Company
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September 25, 1978
affecting Category 1 concrete, be controlled and calibrated at
specified periods to maintain accuracy v1 thin necessary limits in
accordance with approved procedures.
In this case, the sieves are
required to be controlled and calibrated in such a manner to assure
that the requirements of ASTM E-11 have not been degraded through use
following their initial certification by the manufacturer.
Appendices
A.1 and A.2 of ASTM E-11 provide two acceptable commercial prsccices
for verifying and calibrating sieves, i.e. , the use of an optical
comparator or reference NBS samples.
Additionally, Appendix A.3 of
ASTM E-437-71 provides further methods for checking and calibrating
sieves.
With reference to your questions relative to the #50 and #100 sieves,
our inspector observed that repairs by soldering had b'een made, and
the soldering was in the process of failing again, thus affecting the
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accuracy of these sieves.
With respect to Item A.3, our position remains that a "special" proce-
dure is required and must be demonstrated to be capable of producing
code satisfactory radiographs for the minimum material thicknesses to
be radiographed. However, we will take no further action on this
matter pending your receipt of the code inquiry response.
It is our
understanding that you will provide us with a copy of the written
response from the ASME Committee upon its receipt.
The contents of this letter were discussed with NW. Cordell Reed, of
your staff, by Mr. R. F. Heishman, of my staff, on September 25, 1978.
Sincerely,
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James G. Keppler
Director
cc:
Mr. R. Cosaro, Proj ect
Superintendent
cc w/1tr dtd 9/7/78:
Central Files
Reproduction Unit NRC 20b
Local PDR
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Mr. Dean Hansell, Office
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of Attorney General
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