ML13330A081

Requests Providing Expanded Program for Seismic Analysis of Balance of Plant Structures & Development of Instructure Response Spectra.Program Should Include Remainder of Reactor Coolant Pressure Boundary

ML13330A081
Person / Time
Site:	San Onofre
Issue date:	08/04/1980
From:	Eisenhut D Office of Nuclear Reactor Regulation
To:	Dietch R SOUTHERN CALIFORNIA EDISON CO.
References
TASK-03-06, TASK-3-6, TASK-RR NUDOCS 8008250103
Download: ML13330A081 (5)

Text

Docket No. 50-206 Mr. R. Dietch Vice President Nuclear Engineering and Operations Southern California Edison Company 2244 Walnut Grove Avenue Post Office Box 800 Rosemead,,California 91770

SUBJECT:

SAN ONOFRE NUCLEAR GENERATING STATION UNIT NO. 1 SEISMIC RE-EVALUATION PROGRAM

References:

1. Letter with enclosures from K. P. Baskin to D. L. Ziemann, dated April 28, 1980

2. "San Onofre Nuclear Generating Station Unit No. 1 - Seisinic Re-evaluation and Modification,"

dated April 1977

3. "Sikulation of Earthquake Ground Motions for.San Onofre Nuclear Generating Station Unit 1,"

dated May 1978 with "Supplement 1," dated July 1979 Reference 1 provides details of your plans for a 13 month program for the seismic analysis of balance of plant structures and the.development of, instructure response spectra. We recognize that these activities as well as milestones completed during phase 1 of your seismic re-evaluation program represent significant undertakings by the Southern California Edison Co.

As a result of our review of your proposed program, we have identified a few major deficiencies with the information you provided.

You are requested to provide, within 45 days after receipt of this letter, your plans and schedule for an expanded program to include an evaluation of the following:

1. The remainder of the reactor coolant pressure boundary (i.e. all attached piping/equipment),

2. Safety-related mechanical and electrical equipment, and

3.

SafXLy-relcidL l

and eECricl atioution systems.

oPPIcE1.

As part-of phase 1 of-your Seimc re-evalution of.the containment sptere, ei tRcA ctorbuTidin g -and-the-react )rowlant" y utM,youG

• id'H-§ Th'i%-i'tgat

.ATe4i..T.

usner.. ound..r.esp.0ns..spectrui....n..Reference...1 -you..have..i.ndicated............

NRC FORM 318 (9a76)

NRCM 0240 u.s. GoVsRNMuNT PRINTMNO OeICS: 1978 - 269 -74e

Docket No. 50-206 Mr. R. Dietch

-Vice President Nuclear Engineering and Operations Southern California Edison Company 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770

SUBJECT:

SAN ONOFRE NUCLEAR GENERATING STATION UNIT NO. 1 SEISMIC RE-EVALUATION PROGRAM

References:

1. Letter with enclosures from K. P. -Baskin to D. L. Ziemann, dated April 28, 1980

2.

"San Onofre Nuclear Generating Station Unit No. 1-Seismic Re-evaluation and Modification,"

dated April 1977

3. "Simulation of Earthquake Ground Motions for San Onofre Nuclear Generating Station Unit 1,"

dated May 1978 with "Supplement 1," dated July 1979 Reference 1 provides details of your plans for a 13 month program for the seismic analysis of balance of plant structures and the development of instructure response spectra.

We recognize that these activities as well as-milestones completed during phase 1 of your seismic re-evaluation program represent-significant undertaking by the Southern California Edison Co.

As a result of Oew of your pro osed p gram we have i ntifled a; few major~ e ie'.

f You are requested to provide, wit ays after receipt of this leter, your plans and schedule for an expanded program to include an evaluation of.the following:

1. The remainder of the -reactor coolant pressure boundary (i.e. all attached piping/equipment),

2. Safety-related mechanical and electrical equipment, and

3. Safety-related fluid and electrical distribution systems.

As part of phase 1 of'your seismic re-evalaation of the containment sphere, reactor building and the reactor coolant !ystem, you us d as seismic input

-a0.67.g.-Hous.ne.gr.ound respo nse..spectrum. Based on the bes.t..informi..io......

.RNATE O

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9-76). NRCM.0240..

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NRC FORM 318 (9-76) NRCM 0240 GOVERNMENT PRINTING OFFICE. t 978 - 289 769

AUG 04 1980 Mr. R. Dietch

-2 your plans to continue future phases of your program with the same 0.67g Housner ground response spectrum. Our initial evaluation has indicated that this is an appropriate level at which to continue your re-evaluation; however, we plan-to complete our review by November 1,. 1980, at which time we will assess the need for modification of this level.

The analytical part of your re-evaluationprogram should be scheduledfor completion no later than January 1, 1982 with the installation of any required modifications to be completed during the next refueling outage or not later than January 1, 1983. Any proposed'changes to the facility as described in the safety analysis report shall be made in accordance with 10 CFR 50.59 of the Commission Regulations.

In accordance with 10 CFR 50.54(f) of.the Commission Regulations you are requested to submit the information described above under oath or affirmation in orderto enable the Commission to determine whether or not your license should be modifie uspended, or revoked.

Sincerely, Originalj SindB Darrell G. Eisenhut, Director Division of Licensing cc:

See next page.

DISTRIBUTION:

Docket ACRS (16)

NRC PDR NSIC Local PDR TERA SEPB Reading DAllison NRR Reading LReiter DEisenhut HLevin GLainas TCheng RVollmer JPKnight.

DCrutchfield Rucson ORB#5:DL/PM ORB#5:DL/PM AD:CSE:DE ELD TCarter SNowicki*

TWambach*.

JPKnight* lje0hm4o WRssell 6/24/80 6/25/80 6/19/80 7/ (/80 HSmi th TWambach OELD

• See previous yellow for additional concurrences OI&E (3) serIC130 SEPB:DL SEPB:DL SEPB:DL AD:SA:DL D..

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HLevin:dk**

DAllison*

DCrutchfieid* GLainas*

D u t.

RJackson*

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6/1.6/17/80

./2./80 7,

80 6 9/80 NC PORM 318 (9-76)

NRCM 0240 u.e. GOVeaNMeNT PRINTING OFIcH: 1970 709

Mr. R. Dietch

-2 your plans to continue future phases of your program with the same 0.67g Housner ground response spectrum.

Our initial evaluation has indicated that this is an appropriate level at which to continue your re-evaluation; hdwever, we plan to complete our review byNovember 1, 1980, at which time we will assess the need for modification of.this level.

The analytical part-of your re-evaluation program should be scheduled for completion no later than January 1, 1982 with the installation of any required modifications to be completed during the next refueling outage or not later than January 1, 1983. Any proposed changes to the facility as described in the safety analysis report shall be made in accordance with 10 CFR 50.59-of the Commission Regulations.

In addition, within 10 days after receipt of this letter you are requested to describe your intentions for responding; in particular, whether or not you.intend to submit plans and schedules responsive to the items discussed above.

In accordance with 10 CFR 50.54(f) of the Commission Regulations you are requested to submit the information described above under oath or affirmation in order to enable the Commission to determine whether or not your license should be modified, suspended, or revoked.

Sincerely, Darrell G. Eisenhut, Director Division of Licensing cc:

See next page DISTRIBUTION:

Docket TCarter LReiter NRC PDR WRussell HLevin Local PDR HBerkow TCheng SEPB Reading HSmith NRR Reading TWambach DEisenhut OELD Dainsenu OE(3 ORB#5: 'DL/PM ORB#5:DL/PM AD:CSE:DE OELD GLainas&E(3)

SNowicki*

TWambach*

JPnight*

RVollmer NSIC JPngt EA6/24/80 6/25/80 6/19/80 7/4/80 JPKnight TERA DCrutchfield ACRS (16)

• See previous yellow for additional concurrences RJackson DAllison ORB#5:MSEPB:DL RB:D L/P D:DLC D

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7//8

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NRC FORM 318 (9-76) NRCM 0240 u.S. GOVERNMNT PRINTINr Or ICr: 178 - 2e9 -o709

Mr. R. Dietch

-2 we have today, which includes our preliminary ev6luation of reference 3, advice from NRC consultants and'other pertinent data, the 0.67g Housner ground response spectrum should be the level at which to initiate these new evaluations and continue your re-evaluation program.

The analytical part of your re-evaluation program should be scheduled for completo an January 1,1982 with the installation of any modifications o be completed during the next refueling outage or not 1.-

y 1

1983.

ition, Within 10 days after receipt of this letter your are requested to describe your intentions for responding; in particular, whether or.not you intend to submit plans and schedules responsive to the items discussed above.

• I I accordance with 10 CFR 50.54(f) of the Commission Regulations you are requested to submit the information described above under oath or affirmation.

in order to enable the Commission to determine whether or not your license should be modified suspended, or revoked.

Sincerely, Darrell G. Eisenhut,.Director Division of Licensing cc:

See next page DISTRIBUTION:

Docket HSmith NRC PDR TWambach Local PDR OELD SEPBReading OI&E (3)

NRR Reading NSIC DEisenhut TERA GLainas ACRS (16)

RVollmer DALLisoh I

JPKnight LReiter DCrutchfield HL evin R~csn Oe g

DL ORB#5:DL AD: SE:DE RB

PM-OELD TJCarter S owicki TWambach JPK ight Wambach WRussell 6

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0 NRC FORM 318 (9-76) NRCM 0240' GOVERNMENT PRINTING OFICE: 1978 - 265.- 769