ML19323G776

From kanterella
Jump to navigation Jump to search
Responds to NRC 800401 Ltr Re Violations Noted in IE Insp Rept 50-458/79-06.Corrective Actions:Accept/Reject Criteria for Potentially Reactive Aggregate W/Low Alkalai Cement Has Been Deleted
ML19323G776
Person / Time
Site: River Bend Entergy icon.png
Issue date: 04/25/1980
From: Weigand J
GULF STATES UTILITIES CO.
To: Seyfrit K
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19323G774 List:
References
RBG-7553, NUDOCS 8006090015
Download: ML19323G776 (2)


Text

O GULF STATES UTILITIES COMPANY post o F FIC E sox 2951 BEAVYoN* *EXAS 77'04 AREA CCoE 713 938-663:

April 25, 1980 RBG - 7553 File No. G9.5 Mr. Karl V. Seyfrit, Director U.S. Nuclear Regulatory Cor: mission Region IV Office of Inspection & Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, TX 76011

Dear Mr. Seyfrit:

River Bend Station Unit 1 Docket No. 50 h58

Reference:

1) NRC letter dated April 1, 1980 Attached are the GSU responses to your letter of April 1,1980, regarding NRC Inspection 79-06, Items A-1 and 3-2.

We trust this letter satisfactorily answers the concerns raised and we vill be glad to discuss any further points as necessary.

Ver/' truly yours, r

. G. Weigand Vice President Operations & Technical Systems JGW/JEB/mb /

Attach =ent 800609(B:)[7

GSU Response to 79-06, A-1:

A thorough evaluation (E&DCR P-S-2L9, dated T-2h-79) was made by the engineers based on tests, such as ASTM C-289, C-295, and _

partial results of ASTM C-227, before the decision was made to " delete" the requirement for ASTM C-22T on low alkali cement. It was determined that no excessive expansion or deleterious reactions weald occur using low alkali cement. ASTM C-33 states in part, " . . . aggregate for use in concrete . . . shall not contain any materials that are deleteriously reactive with the alkalies in the cement . . . , except that if such are present in injurious amounts, the (fine / course) aggregate may be used with a cement containing less than 0.6% alkalies calculated as sodium oxide ...". Since low alkali cement is used and the aggregates are potentially reactive, the accept / reject criteria for potentially react-ive aggregate using low alkali cement is redundant. C-227 tests are being conducted (information only basis) so that if in the future high alkali cement is used, there will be documented back-up information regarding the alkali-aggregste reaction and a technically sound judge-ment can be made regarding its use.

Since ne high alkali cement has been used, this deletion has no effect on the quality of concrete produced at River Bend in terms of alkali-aggregate reactions, and it is felt that the deletion was based on technically sound judgement.

Corrective Action Taken to Prevent Further Noncomuliance:

An E&DCR is being generated which will address the accept / reject criteria of ASTM C-227 for the aggregate if high alkali cement is to be used.

Date When Full Compliance Will Be Achieved:

In co=pliance as far as low alkali cement is concerned. June 1, 1980, for the evaluation method for use of high alkali cement.

GSU Response to T9-06, B-2:

I The old specification (210.360) had an accept / reject criteria that applied if high alkali cement was being used. Since this is not the situ-ation at River Bend, the redundant accept / reject criteria was deleted and the test was continued on a "for infonnation only" basis to be used if high alkali ce=ent is to be utilized at the site in the future.

1 Corrective Action Taken to Prevent Further Noncompliance:

Same as in A-1.

Date When Full Compliance Will Be Achieved:

Sa=e as in A-1.