ML18018A737

Forwards Request for Addl Info Resulting from 830728 Audit of Class I Piping Design Documentation.Timely Response Should Be Submitted to Meet Target Date of Nov 1983 for SER Issuance

ML18018A737
Person / Time
Site:	Harris
Issue date:	08/25/1983
From:	Knighton G Office of Nuclear Reactor Regulation
To:	Utley E CAROLINA POWER & LIGHT CO.
References
NUDOCS 8309120522
Download: ML18018A737 (5)

Text

~rf 'UG 35 1983 Docket Nos.:

50-400 and 50-401 Mr.EE. E. Utley Executive Vice President Power Supply and Engineering and Construction Carolina Power

& Light Company Post Office Box 1551 Raleigh, North Carolina 27602

Dear 11r. Utley:

- DISTRIBUTION

~Document:Control=50=400/401>

PRC System NRC PDR L PDR NSIC LB¹3 Reading JLee BBuckley JHolonich

Attorney, OELD

Jordan, IE

-Taylor, IE ACRS (16)

TMNovak

Subject:

Request for Additional Information on Class 1 Piping Design Docuijntation - Shearon Harris At an audit of class 1 piping design documentation he'ld on July 28, 1983 between representatives from the staff and Carolina Power and Light, several concerns were raised that could not be satisfactorily resolved at that time.

The reqdasted information is contained in the enclosure.

We request that you submit j=response to the enclosed request in a timely manner to support the target date of November 1983 for issuance ofithe SER.

If any clarification or,discussion of the enclosed request is required, please contact the Shearon Harris >oject Manager.

Sincerely, Originai signed Sy<'eorge Mt. Knighton George W. Knighton, Chief Licensing Branch No.

3 Division of Li:,'censing

Enclosure:

As stated cc:

See next page 8309120522 830825 ll PDR 'ADQCK 05000400,

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Shearon Harris Mr.

E.

E. Utley Executive Vice President Power Supply and Engineering and Construction Carolina Power 8 Light Company Post Office Box 1551

Raleigh, North Carolina 27602 cc:

George F. Trowbridge, Esq.

Shaw,'ittman, Potts 8

Trowbridge 1800 M

Street, NW Washington, D.

C.

20036 Richard E. Jones, Esq.

Associate General Consel Carolina Power 8 Light Company 411 Fayetteville Street Mall

Raleigh, North Carolina 27602 M. David Gordon, Esq.

Associate Attorney General State of" North Carolina Post Office Box 629

Raleigh, North Carolina 27602 Thomas S. Erwin, Esq.

115 W. Morgan Street

Raleigh, North Carolina 27602 Mr. George Maxwell Resident Inspector/Harris NPS c/o U.S. Nuclear Regulatory Commission Route 1, Box 315B.

New Hill, North Carolina 27562 Charles D.

Barham, Jr.,

Esq.

Vice President 8 Senior Counsel Carolina Power 5 Light Company Post Office Box 1551

Raleigh, North Carolina 27602 Mr. John Runkle, Executive Coordinator Conservation Council of North Carolina 307.Granville Road Chapel Hill, North Carolina 27514 Mr. Wells Eddleman 718-A Iredell Street Durham, North Carolina 27705 Mr. George Jackson, Secretary Environmental Law Project School of Law, 064-A University of North Carolina Chapel Hill, North Carolina 27514 0r. Ph~J)is Lotchin Chapel Hill, North Carolina 27514 Mr. Travis Payne, Esq.

723 W. Johnson Street Post Office Box 12643

Raleigh, North Carolina 27605 Mr. Daniel F.

Read, President CHANGE Post Office Box 524 Chapel Hill, North Carolina 27514 Bradley W. jones, Esq.

U.S. N'uclear Regulatory Commission Region II

'I01 Marietta Street

,i Atlanta, Georgia 30303 I ~

'ichard D. Wilson, M.

D, 725 Hunter Street Apex, North Caroli'na 27502 Regional Adminstrator - Region II

'U.S. Nuclear Regulatory Commission

)01 Marietta Street Suite 3100 (1anta, Georgia 30303 en E. Long, Esq.

" Staff Attorney Public Staff -

NCUC Post Office Box 991

Raleigh, North Carolina 27602 I>

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Shearon Harris Dr. Linda Little Governor's Waste Management Board 513 Albemarle Building 325 North Salisbury Street

Raleigh, North Carolina 27611

210.

f'MECHANICAL ENGINEERING BRANCH 210.77 210.78 In our review of your design specifications for ASHE Class 1

piping, we expressed a concern regarding the minimum wall thickness permitted at girth butt welds.

We would expect this minimum to be controlled for shop fabrication by (Westinghouse)

Specification G-678843 and/or.G-679187.

In Specification G-678843, Section 6.1.7 states:

. providing such grinding does not infringe on the required minimum wall thickness of the piping".

(a)

Define what is meant by "required minimum wall thickness of the piping".

For example, is it the wall thickness calculated by Eq. (1) or Eq. (3) in NB-3600 (1971)?

(b) If the definition of minimum wall thickness is less than (7/8) of the nominal wall thickness used in stresses

analyses, indicate what modifications to the Stress Indices are used to account for significantly less-than-nominal wall thickness at girth butt welds.

(c)

Indicate what action is required by your specifications should localized areas of girth but'.welds be inadvertently ground beyond the "required minimum wall thickness".

Is repair welding always required in such situations or is further evaluation without repair welding permitted?

If so, what criteria are applied to determine when repair welding is necessary.

In our review of your design report for the reactor coolant loop piping, we found that only Volume 1, "Structural Analysis of the Reactor Coolant Loop for Shearon Harris Nuclear Station, Units 1, 2, 3, 4", was available for review and that it was preliminary.

We were informed that the complete stress report would consist of five volumes.

The following information is required to complete our review.

Provide a schedule of when the following information will be available for our review:

(a)

Complete Stress Report (Not necessarily final in representing the as-built) of the Reactor Coolant Loop Piping for Shearon Harris.

(b) If not included in the Stress

Report, a tabulation of numerical values of all Stress Indices used in the analysis.

(c) If Stress Indices are used that are not obtained from Table NB-3683.2-1 (1971) or analogous tables from later Code editions, a description of the technical basis for those Stress Indices.

(d) If not included in'he Stress Report, details of the fatigue evaluation of that location which gives the highest usage factor.

Those details are to include pressure

ranges, moment ranges, thermal stress ranges and the number of assumed cycles of each.