ML20133G070

Concludes That Info Submitted in Re Application for Odyn to ATWS & non-pressurization Transients Provide Sufficient Documentation to Start Review

ML20133G070
Person / Time
Issue date:	01/10/1997
From:	Lyons J NRC (Affiliation Not Assigned)
To:	Sozzi G GENERAL ELECTRIC CO.
References
NUDOCS 9701150122
Download: ML20133G070 (1)

Text

January 10, 1997 G. L. Sozzi Services General Manager GE Nuclear Energy Technical Services General Electric Com) arty 175 Curtner Avenue, ilC 706 San Jose. CA 95125

SUBJECT:

APPLICATION OF ODYN COMPUTER PROGRAM TO ATWS AND NON-PRESSURIZATION TRANSIENTS

Dear Mr. Sozzi:

After reviewing your October 10. 1996 letter, regarding the application of ODYN to ATWS and non-pressurization transients, we have concluded that the information you propose to submit will provide sufficient documentation for us to start our review.

However, we will also need. as a minimum, some benchmark calculations comparing ODYN collapsed level predictions to plant transient data.

Once the proposed documentation is received, the staff will schedule the review commensurate with its priority and our available resources.

Sincerely.

M l

James E. Lyons. Acting Branch Chief Division of Systems Safety and Analysis Office of Nuclear Reactor Regulation cc:

A. Thadani B. Sheron l

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MOVENFORCEMENT CONFERENCE i

Immediate Corrective Actions i

Technical Consultant Review e Current Program Element Evaluation e Program Management Evaluation l

RG&E 11/13/96 1

MOVENFORCEMENT CONFERENCE i

immediate Corrective Actions I

I Technical Consultant Review of Program Elements e

Sizing & TS Setting GL 9-10 Screening & Selection s

Calculations i

System Analysis (Flow & DP) i s

PL/TB Susceptibility s

e In-plant Testing r

s Seismic / Weak Link e

Periodic Maintenance i

. Degraded Voltage s

s DC Stroke Time unans na&e e

Periodic Venfication 2s i

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MOVENFORCEMENT CONFERENCE Immediate Corrective Actions I

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Technical Consultant Program Management Review

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e How the Elements Related i

e How the Elements were Controlled e How Information was Handled e What were the Results I

"'j3'96 naae h

MOV ENFORCEMENT CONFERENCE Immediate Corrective Actions i

Technical Consultant Review Results e All Elements Appeared to be Addressed j

e Technical Guidance Generally Acceptable v Depth of Guidance j

v Some Outdated Information e Elements Tended to be Stand-Alone v Not well Integrated v Potentially Conflicting Information e Need to Develop " Program" Approach RG&E

1 MOVENFORCEMENT CONFERENCE i

Immediate Corrective Actions i

i Technical Consultant Program Management Results j

e Elements were Disjointed, Hard to Follow e Lack of Strong Central Control & Oversight e Feedback Not WellIntegrated e Resulted in Less than Optimal Program 11/ W RG&E

MOV ENFORCEMENT CONFERENCE 1

f Immediate Corrective Actions I

i j

i s

Peer Review i

O Comparison of Ginna's to Benchmark Plant

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l v Procedures v Processes v Resources i

11 96 RG&E

MOV ENFORCEMENT CONFERENCE 4

Immediate Corrective Actions I

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Peer Review Results e Feedback Process v Lack of Formal Documentation i

v Field Test Data Weakness l

e Training v Inadequate Cross Training

- Engineers

- Field Technicians mg,6 om I