ML19321A332

Responds to Re Frequency of Correlation Strength Test Sampling on New safety-related Concrete.Nrc Position Reflects Increased Testing During Periods of Low Vol Placement

ML19321A332
Person / Time
Site:	Midland
Issue date:	07/09/1980
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	Marshall W AFFILIATION NOT ASSIGNED
References
NUDOCS 8007230190
Download: ML19321A332 (5)

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JUL9 1E0 Mr. Wendell H. Marshall Poute 10 Midland, MI 48640

Dear Mr. Marshall:

This will respond-to your letter of June 5,1980 concerning the position taken by the staff for the inspection and testing of safety related concrete at the Midland Plant, Units 1 & 2.

The position of interest regards the frequer.cy at which correlation strength test sampling should be performed as new safr.ty related concrete is being placed.

Your letter notes some alarm with car statement that the applicant should comply with present quality control /

assurance requirements developed by the industry and which have ';een adopted in the professional community.

You question whether the correlation testing for concrete already placed is considered faulty and whether that concrete can be relied upon. You also ask how we will assure sampling to the new position and you request to receive a copy of the applicant's reply to our position letter of May 22, 1980.

I believe that a closer review of our enclosed requests numbered 421.6 and 421.7, and the applicants reply to these requests, indicate no cause for alarm as to the integrity of the Midland concrete. Rather, our position reflects a desire for increased correlation testing for subsequent concrete pours to be made during periods of low volume placement such that a twice-weekly criterion would be controlling.

The standard in question is by t, American National Standards Institute and is designated ANSI N45.2.5.

This standard addresses quality assurance requirements for installation, inspection, and testing of structural concrete during the construction phase of nuclear power plants.

It was first prepared in 1974 and was subsequently approved and designated ANSI /ASME N45.2.5-1978 on March 8, 1978.

It is the 1978 version to which we refer by our statement that the applicant should comply with present quality control / assurance requirements.

The 1978 version provides criteria regarding correlation strength testing not available in the 1974 version. The frequency of such sampling may be based upon each 500 cubic yards of concrete placed, or twice a week, whichever provides the greater number of samples.

You will note in the applicants' attached reply to request 421.6 that in the past, during which 98% of the safety related concrete was placed, high volume rates of concrete were being poured and every 300 cubic yards were sampled as the controlling criterion.

The applicants criterion of 300 cubic yards is more conservative than the 500 cubic yards specified in the 1978 version of the standard for high volume periods.

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Mr. Wendell H. Marshall JUL 9 USD The applicant's sampling criterion of once a week was intended to apply to the remaining 2% of safety related concrete yet to be poured. Our position in enclosed request 421.7 notes that the -1978 standard calls for twice-a-week sampling during low volume placement periods and that this aspect of the 1978 standard should be applied to subsequent placements at Midland. Although the applicants reply to request 421.7 has not been received at this time, the construction schedule at Midland is such that no further safety related concrete will be poured until this matter is resolved to our satisfaction.

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- Our resident inspector with-the Office of Inspection and Enforcement, who is located at the Midland Plant site on a full time basis, is aware of this position.

The applicant has stated that a reply to our position will be submitted in early 1

July 1980.

In accordance with your request, a copy of that reply will be i

forwarded to you once received.

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I trust this reply has been responsive to your concern.

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A. Schwencer, Acting Branch Chief l

Licensing Branch No. 3 Division of Licensing 4

Enclosures:

421.6 421.7 cc: See next page i

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Mr. J. W. Cook Vice President Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201 cc: Michael I. Miller, Esq.

Isham, Lincoln & Beale Suite 4200 1 First National Plaza Chicago, Illinois 60603 Judd L. Bacon, Esq.

Managing Attorney Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Mr. Paul A. Perry, Secretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Myron M. Cherry, Esq.

1 IBM Plaza Chicago, Illinois 60611 Ms. Mary Sinclair 5711 Sunmerset Drive Midland, Michigan 48640 Frank J. Kelley, Esq.

Attorney' General State of Michigan Environmental Protection Division 720 Law Building Lansing, Michigan 48913 Mr. Wendell Marshall Route 10 Midland, Michigan 48640 Grant J..Merritt, Esq.

Thompson, Nielsen, Klaverkamp & James 4444 IDS Center 80 South Eighth Street Minneapolis, Minnesota 55402

Mr. S. H. Howell cc: Mr. Don van Farowe, Chief George C. Wilson, Sr.

Division of Radiological Health 4618 Clunie Department of Public Health Saginaw, Michigan 48603 P. O. Box 33035 Lansing, Michigan 48909 Ms.' Carol Gilbert 903 N. 7th Street William J. Scanlon, Esq.

Saginaw, Michigan 48601 2034 Pauline Boulevard Ann Arbor, Michigan 48103 Mr. William A. Thibodeau Saginaw,gl Road 3245 Wei Michigan 48603 U. S. Nuclear Regulatory Commission Resident Inspectors Office Route 7 Mr. Terry R. Miller Midland, Michigan "8640

'3329 Glendora Drive Bay City, Michigan 48706 Ivan W. Smith, Esq.

Atomic Safety & Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Mr. Gustave A. Linenberger Atomic Safety & Licensing Board U. S. Nuclear Regulatory Commission Washington' D. C.

20555 Dr. Frederick P. Cowan 6125 N. Verde Trail Apt. B-125 Boca Raton, Florida 33433 Grant J. Merritt, Esq.

Thompson, Nielson, Klaverkamp & James 80 South Eithth Street Minneapolis, Minnesota -55402

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Mr. Steve Gadler 2120 Carter Avenue St.. Paul, Minnesota 55108 Mr. Michael A. Race 2015 Seventh Street Bay City, Michigan 48706 Ms. Sandra D. Reist 1301 Seventh Street Bay City, Michiga,n 48706 Sharon K. Warren 636 Hillcrest Midland, Michigan 48640 Patrick A. Race 1004 N. Sheridan Bay City, Michigan 48706

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cc: Commander, Naval Surface Weapons Center ATTN:

P. C. Huang G-402 White Oak Silver Spring,- Maryland 20910 Mr. L. J. Auge, Manager Facility Design Engineering Energy Technology Engineering Center

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P. O. Box 1449 Canoga, Park, California 91304 Mr. William Lawhead U. S. Corps of Engineers NCEED - T 7th Floor 477 Michigan Avenue Detroit, Michigan 48226 6

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. YAY 2 21980

%, v.....f Docket Nos.: 50-329/330 Mr. S. H. Howell Vice President Consumers Power Company 212 West Mic.higan Avenue Jackson, Michigan 49201

SUBJECT:

STAFF POSITION FOR INSPECTION AND TESTING OF REMAINING SAFETY RELATED STRUCTURAL CONCRETE INSTALLATION He have reviewed your response to our request 421.6 provided by FSAR Revision 26 regarding certain exceptions to Regulatory Guide 1.94, entitled

" Supplementary Quality Assurance Requirements for Installation, Inspection, and Testing of Structural Concrete and Structural Steel During the Construc-tion Phase of Nuclear Power Plants". Your exceptions regard the location at which concrete test samples are taken, and the frequency at which the correlation strength test sampling.is performed. The enclosure provides our posit. ion for these matters for all remaining safety related structural concrete installations, and in particular, that associated with any future modifications or additions to Q-listed structural concrete presently in place.

You are requested to advise us within seven days of receipt of this letter as to your intentions regarding conformance to our position and to amend your FSAR responses and construction procedures within 20 days from this receipt. Contact us should you require any clarification of this position.

Sincerely,

.i s 4 GLOS & w A. Schwencer, Acting Chief Licensing Branch No. 3 Division nf Licensing

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