ML19319D837

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Forwards Insp Rept 50-312/74-08 on 740915,16,24 & 25.No Noncompliance Noted.Predicted & Measured Control Rod Worth Discrepancy Raises Questions Re Assumptions Used in Analysis of Hypothetical Rod Ejection Analysis in FSAR
ML19319D837
Person / Time
Site: Rancho Seco
Issue date: 10/16/1974
From: Engelken R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
To: Mattimoe J
SACRAMENTO MUNICIPAL UTILITY DISTRICT
Shared Package
ML19319D832 List:
References
NUDOCS 8003250825
Download: ML19319D837 (2)


See also: IR 05000312/1974008

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UNITED STATES

ATOMIC ENERGY COMMISSIOf

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QCT 161974

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Sacramento Municipal Utility District

Docket No. 50-312

P. O. Box 15832

Sacramento, California 95813

Attention: John J. Mattimoe, Assistant General

Manager and Chief Engineer

Gentlemen:

This refers to the inspection conducted by Mr. A. D. Johnson and

Mr. L. J. Garvin of this office on September 15,16, 24 and 25,1974 of

activities authorized by AEC License No. DPR-54, and to the discussion

of our findings held by Mr. Johnson with Messrs. D. Raasch and R. Rodriguez

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and other members of your staff at the conclusion of the inspection.

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Areas examined during this inspection are described in the enclosed

inspection report. -Within these areas, the inspection consisted of

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selective examinations of procedures and representative records, inter-

views with personnel, and observations by the inspector.

No violations of AEC requirements were identified within the scope of

this inspection.

The discrepancy between the predicted and measured worth of a control rod

raises some questions concerning the validity of certain assumptions used

in the analysis of the hypothetical rod ejection accident in the FSAR

(Section 14.2.2.4) and the adequacy of the Technical Specifications

relative to control rod grouping and operation. This matter has been

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' forwarded to our Headquarters for further evaluation. We will inform you

of the evaluation results.

In accordance with Section 2.790 of the AEC's " Rules of Practice,"

Part 2, Title 10, Code of Federal Regulations, a copy of this letter and

the enclosed inspection report will be placed in the AEC's Public

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Document Room.

If this report contains any information. thatJou believe

to be proprietary, it is ndcessary that you submit'a' written application

to this office, within 20 days of the date of this letter, requesting,

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Sacramento Municipal Utility District

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OCT 161974

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that such information be withheld from public disclosure. The applica-

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tion must include'a full statement of the reasons why it is claimed that

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the information is proprietary. The aoplication should be prepared so

that any proprietary information identified is contained in an enclosure

to the application, since the application without the enclosure will

also be placed in the Public Document Room.

If we do not hear from you

in this regard within the specified period, the report will be placed in

the Public Document Roon.

Should you have any questions concerning this inspection, we will be

glad to discuss them with you.

Sincerely,

Original signeif tpf

R. H. Engelken

R. H. Engelken

Director

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Enclosure:

R0 Inspection Report

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No. 50-312/74-03

cc w/o enclosure:

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Mr. R. Rodriguez, SMUD

Mr. L. Schwieger, St1U3

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R0 Chief, FS&EB

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