ML16341D648

Forwards Summary of 860220 Meeting W/Licensee to Discuss Structural Aspects of Proposed Spent Fuel Pool Reracking. Seven Specific Requests for Addl Info Identified.Response Needed by 860307

ML16341D648
Person / Time
Site:	Diablo Canyon
Issue date:	02/28/1986
From:	Schierling H Office of Nuclear Reactor Regulation
To:	Shiffer J PACIFIC GAS & ELECTRIC CO.
References
NUDOCS 8603130298
Download: ML16341D648 (70)

Text

Docket Nos.

50-275 and 50-323 February 28, 1986 Mr. J.

D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106

SUBJECT:

RERACKING OF SPENT FUEL POOLS D IS IBUTION cet ie L PDR PAD-3 Rdg OELD H. Schierling D. Jeng F. Rinaldi E. Jordan J. Partlow NRC PDR Gray File H. Thompson C.

Vogan R. Ballard J.

McGurren C. Herrick B. Grimes ACRS 10 On February 20, 1986 we met with your staff to discuss certain structural aspects of your proposed spent fuel pool reracking.

A summary of the meeting is enclosed.

It identifies seven (7) specific requests for additional information as discussed at the meeting.

We request that you provide this information as soon as possible but not later than March 7, 1986.

The reporting and/or recordkeeping requirements of this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Enclosure:

~As stated

/s/HSchierling II tl l

Hans E. Schier ling, Senior 'Project Manager PWR Project Directorate No. 3,-

Division of PWR Licensing-A cc w/enclosure:

See next page PAD-3 CVogan 02/ /86 PAD-3 HSchierling/pws 02/y$/86 PA 3

0$'6 8603'0298 860228 PDR ADOCg 0SOOOm'S P

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Mr. J.

D. Shiffer Pacific Gas and Electric Company Diablo Canyon CC:

Philip A. Crane, Jr.,

Esq.

Pacific Gas

& Electric Company Post Office Box 7442 San Francisco, California 94120 Mr, Malcolm H. Furbush Vice President - General Counsel Pacific Gas

& Electric Company Post Office Box 7442 San Francisco, California 94120 Janice E. Kerr, Esq.

California Public Util'ities Commission 350 McAllister Street San Francisco, California 94102 Mr. Frederi c k Ei ss 1 er, Pres ident Scenic Shoreline Preservation Conference, Inc.

4623 More Mesa Drive Santa Barbara, California 93105 Ms. Elizabeth Apfelberg 1415 Cozadero San Luis Obispo, California 93401 Mr. Gordon A. Silver Ms. Sandra A. Silver 1760 Alisal Street San Luis Obispo, California 93401 Harry M. Willis, Esq.

Seymour

& Willis 601 California Street, Suite 2100 San Francisco, Cali for nia 94108 Mr. Richard Hubbard MHB Technical Associates Suite K

1725 Hamilton Avenue San Jose, California 95125 Resident Inspector/Diablo Canyon NPS c/o US Nuclear Regulatory Commission P. 0.

Box 369 Avila Beach, California 93424 Ms.

Raye Fleming 1920 Mattie Road Shell Beach, California 93440 Joel

Reynolds, Esq.

John R. Phillips, Esq.

Center for Law in the Public Interest 10951 West Pico Boulevard Third Floor Los Angeles, California 90064 Mr. Dick Blankenburg Editor & Co-Publisher South County Publishing Company P. 0.

Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.

Norton, Burke, Berry

& French, P.C.

202 E. Osborn Road P. 0.

Box 10569 Phoenix, Arizona 85064 Mr.

W.

C. Gangloff Westinghouse Electric Corporation P. 0.

Box 355 Pittsburgh, Pennsylvania 15230 David F. Fleischaker, Esq.

P. 0.

Box 1178 Oklahoma City, Oklahoma 73101 Mr. John Marrs, Managing Editor San Luis Obis o Count Tele ram Tribune 1

o nson venue P. 0.

Box 112 San Luis Obispo, California 93406

Pacific Gas 5 Electric Company Diablo Canyon CC:

Arthur C. Gehr, Esq.

Snell

& Wilmer 3100 Valley Center Phoenix, Arizona 85073 Mr. Leland M. Gustafson, Manager Federal Relations Pacific Gas 5 Electric Company 1726 M Street, N.W.

Suite 1100 Washington, DC 20036-4502 Regional Administrator, Region V

U.S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Michael J.

Strumwasser, Esq.

Special Counsel to the Attorney General State of California 3580 Wilshire Boulevard, Suite 800 Los Angeles, California 90010 Mr. Tom Harris Sacramento Bee 21st and 0 Streets Sacramento, California 95814 Mr. H. Daniel Nix California Energy Commission 1516 9th Street, MS 18 Sacramento, California 95814 Lewis Shollenberger, Esq.

US Nuclear Regulatory Commission Region V

1450 Maria Lane Suite 210 Walnut Creek, Cali fornia 94596 Mr. Thomas Devine Government Accountability Project Institute for Policy Studies 1901 Que Street, NW Washington, DC 20009 Chairman San Luis Obispo County Board of Supervisors Room 220 County Courthouse Annex San Luis Obispo, California 93401 Director Energy Facilities Siting Division Energy Resources Conservation and Development Commission

.1516 9th Street Sacramento, California 95814 President California Public Utilities Commission California State Building 350 McAllester Street San Francisco, California 94102 Mr. Joseph

0. Ward, Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building ¹8 Sacramento, California 95814

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UNITE0 STATES CLEAR REGULATORY COMMISSI WASHINGTON, D. C. 20555 ENCLOSURE February 28, 1986 Docket Nos.:

50-275 and 50-323 LICENSEE:

Pacific Gas and Electric Company (PG&E)

FACILITY:

Diablo Canyon Nuclear Power Plant, Units I and 2

SUBJECT:

MEETING

SUMMARY

- RERACKING OF SPENT FUEL POOLS On February 20, 1986 the NRC staff and its consultant met with PG&E to discuss certain structural aspects of the proposed spent fuel racks and the spent fuel pools.

The meeting notice and list of attendees are provided in Enclosures I and 2.

PG&E had prepared draft responses to NRC questions 26 and 27 which were sent to PG&E by letter dated February 18, 1986.

K. Singh of Joseph Oat Corporation, designer and manufacturer of the proposed

racks, discussed the responses in detail and provided additional clarification and background information.

The staff request'ed the following further clarifi-cation and details be included in the responses:

1.

Regarding Item 26 on the validation of the computer code

DYNAHIS, the specific benchmark problems should be identified and appro-priately referenced.

The results, including response comparisons, of problems run with the DYNAHIS code and the ANSYS code should be provided.

Discuss the extent of use of the DYNAHIS code in reracking applications by other utilities. (Item 26a*).

2.

Regarding Item 27 on load combinations for the racks, each of the critical loading cases for the rack module qualification and stability consideration should be described in detail, including a summary description of other cases that were considered in the development of the final rack design.

Discuss quantitatively/

qualitatively why these loading cases envelope other loading arrangements that can exist.

Discuss the potential and safety margin for over turning the limiting rack module.

(Item 27a*).

S. Bhattacharya of PG&E discussed in detail the design and qualification of the fuel pool liner and structure for the proposed increased storage capacity of the spent fuel pools.

Viewgraphs used in the discussion are provided in Enclosure 3.

As a result of the discussion the staff requested that the following additional information be provided (note:

numbering continued from above):

3.

Discuss the effect of the added weight of the racks and fuel assemblies on the building response.

(Item 28*).

• This numbering is a continuation of previous staff requests for additional information.

lN February 28, 1986 4.

Discuss the potential for and consequence of rack module interaction with the pool wall.

( Item 29*).

5.

Discuss how postulated sliding of the racks could affect the fuel pool floor if an airspace is assumed to exist underneath the liner, for example, as a result of concrete shrinkage.

(Item 30*).

6.

Provide details on the spent fuel cask pit, including dimensions of the recessed

area, depth of the pit, distance from "Rack Module E" to the edge of the pit.

Discuss the cask restraining device shown in the FSAR.

(Item 31*).

7.

Discuss the spent fuel pool leak chase

system, including the frequency for leakage monitoring and applicable technical specifications and operating procedures.

(Item 32*).

The staff requested that the response to Items 26 and 27 (NRC letter of February 18, 1986), including the additional information in Items I through 7 (i.e, Items 26a,

27a, 28 through 32) above should be provided by March 7, 1986.

PGKE stated that the Unit I outage could start as early as early in July 1986.

The new fuel for Cycle 2 of Unit I is scheduled to arrive at the site in mid-June.

In order to complete the proposed spent fuel pool reracking by the above dates the modifications would have to be started in early April.

The staff stated that three requests for intervention/

hearing have been received.

The staff is continuing its evaluation of the proposed reracking.

A final determination regarding no significant hazards consideration, if appropriate, must be issued prior to issuing a license amendment on the reracking.

.< 8=

Hans E. Schierling, Senior Project Manager PWR Project Directorate No.

3 Division of PWR Licensing-A

Enclosures:

As stated cc w/enclosures:

See next page

Pacific Gas and Electric Company D>ablo Canyon CC:

Philip A. Crane, Jr.,

Esq.

Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Hr. Malcolm H. Furbush Vice President - General Counsel Pacific Gas 8 Electric Company Post Office Box 2442 San Francisco, California 94120 Janice E. Kerr, Esq.

California Public Utilities Commission 350 HcAllister Street San Francisco, California 94102 Mr. Frederick Eissler, President Scenic Shoreline Preservation Conference, Inc.

4623 Hnre Mesa Drive Santa Barbara, California 93105 Ms. Elizabeth Apfelberg 1415 Cozadero San Luis Obispo, California 93401 Mr. Gordon A. Silver Ms. Sandra A. Silver 1760 Alisal Street San Luis Obispo, California 93401 Harry H. Willis, Esq.

Seymour 8 Willis 601 California Street, Suite 2100 San Francisco, California 94108 Yr. Pichard Hubbard MHB Technical Associates Suite K

1725 Hamilton Avenue San Jose, California 95125 Resident Inspector/Diablo Canyon NPS c/o US Nuclear Regulatory Commission P. 0.

Box 369 Avila Beach, California 93424 Ms. Raye Fleming 1920 Mattie Road Shell Beach, California 93440 Joel

Reynolds, Esq.

John R. Phillips, Esq.

Center for Law in the Public Interest 10951 West Pico Boulevard Third Floor Los Angeles, California 90064 Mr. Dick Blankenburg Editor 8 Co-Publ is her South County Publishing Company P. 0.

Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.

Norton, Burke, Berry 5 French, P.C.

202 E. Osborn Road P. 0.

Box 10569 Phoenix, Arizona 85064 Mr. W. C. Gangloff Westinghouse Electric Corporation

'P. 0.

Box 355 Pittsburgh, Pennsylvania 15230 David F. Fleischaker, Esq.

P. 0. Box 1178 Oklahoma City, Oklahoma 73101 Mr. John Marrs, Managing Editor San Luis Obis o Count Teleoram Tribune 1321 Jn nson venue P. 0.

Box 112 San Luis Obispo, California 93406

C

Pacific Gas

& Electric Company Diablo Canyon CC:

Arthur C. Gehr, Esq.

Snell

& Wilmer 3100 Valley Center Phoenix, Arizona 85073 Mr. Leland M. Gustafson, Manager Federal Relations Pacific Gas

& Electric Company 1726 M Street, N.W.

Suite 1100 Washington, DC 20036-4502 Regional Administrator,. Region V

U.S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, Cali fornia 94596 Michael J. Strumwasser, Esq.

Special Counsel to the Attorney General State of California 3580 Wilshire Boulevard, Suite 800 Los Angeles, California 90010 Mr. Tom Harris Sacramento Bee 21st and 0 Streets Sacramento, California 95814 Mr. H. Daniel Nix Cali fornia Energy Commission 1516 9th Street, MS 18 Sacramento, Cal ifornia 95814 Lewis Shollenberger, Esq.

US Nuclear Regulatory Commission Region V

1450 Maria Lane Suite 210 Walnut Creek, Cali fornia 94596 Mr. Thomas Devine Government Accountability Project Institute for Policy Studies 1901 gue Street, NW Washington,'C 20009 Chairman San Luis Obispo County Board of Supervisors Room 220 County Courthouse Annex San Luis Obispo, California 93401 Director Energy Facilities Siting Division Energy Resources Conservation and Development Commission 1516 9th Street Sacramento, California 95814 President California Public Utilities Commission California State Building 350 McAllester Street San Francisco, California 94102 Mr. Joseph

0. Ward, Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building 88 Sacramento, California 95814

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UNITED STATES UCLEAR REGULATORY COMMlSS ENCLOSURE l WASHINGTON, D. C. 20555 FEB 11 886 Docket Nos.- 50-275 and 50-523 HEHORANDUH FOR:

Steven A. Yarga, Director PWR Proiect Directorate a73 Division of PWR Licensing-A FROH:

SUBJECT:

DATE 5 TIME:

LOCATION:

PURPOSE:

Hans Schierling, Senior Project Hanager PWR Project Directorate 83 Division of PWR Licensing-A DIABLO CANYON - HEETING WITH PACIFIC GAS Al'lD ELECTRIC CO.

ON SPENT FUEL POOL RERACKING February 20, 1986 9:00 a.m. - 5:00 p.m.

Poom 6507 Harylarhd National Bank Building Old Georgetown Road

Bethesda, Haryland

~

Discussion of seismic structural issues regarding the proposed spent fuel pool reracking and structure for Diablo Canyon Units I and 2.

PARTICIPANTS:

NRC:

H. Schierling, R. Ballard, D. Jeng, F. Rinaldi, C, Herrick (Consul tant) pgSE:

M. Tressler, D. Ogden, B. Lee, K. Singh (J.

Oat Cn.

, et al.

ans Schierling, Sen r Project Manager

,PWR Project Directorate 83 Division of PWR Licensinq-A

0 l

ENCLOSURE 2 ATTENDEES NRC/PG&E MEETING DIABLO CANYON UNITS I AND 2 RERACKING OF SPENT FUEL POOLS FEBRUARY 20, 1986 BETHESDA, MARYLAND B. Lew R. Anderson K. Singh D. Ovadia S. Bahattacharya R. Herrick R. Ballard D. Jeng F. Rinaldi H. Polk D. Ogden J.

McGurren S. Johnson R. Locke G. Sarkisian H. Schierling PG&E PG&E J.

Oat Company Bechtel PG&E Franklin Research Center (NRC Consultant)

NRC -

PWRA NRC -

PWRA NRC -

PWRA NRC -

NRR PG&E NRC - OELD Bechtel PG&E PG&E NRC -

PWRA

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SECTION 8

TYPICAL DETAILS NALL LINER PLATE FIGURE 6

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SIGNIFI CANT DESIGN FEATURES POOL STRUCTURE IS SUPPORTED ON BED ROCK FOUNDATION SLAB 5'HICK NLLS, IN GENERAL, 6'HICK STAINLESS STEEL LINER IS PROVIDED FOR LEAKTHIGHTNESS EACH MELD SEN IS PROVIDED MITH A LEAK QNSE.

ALL LEN CHASE LEAD TO A COLLECTION

POINT,

DESiGN INFO(NATION LOADS AND LOAD CONBINATIONS FSAR SECTION 3.8.2.3 ACCEPTANCE CRITERIA FSAR SECTION 3.8,2.5 DESIGN AND ANALYSIS PROCEDURE FSAR SECTION 3.8.2.0

Draft 7 The spent fuel pool structural analysis, addressed in the FSAR. is affected by the high density fuel racks due to the following:

o Height of the proposed high-density racks o

Thermal gradient across the valls o

Interaction between the racks and the pool structure The effect of these items is addressed in the response to Question 15 below.

There are no physical changes to the spent fuel pool concrete structure addressed in the FSAR analysis.

However, minor modifications to the liner plate will be made to accommoda'te the high-density racks.

The modifications include relocation of spent fuel handling tool brackets to the east end of the north and south walls of Units 1 and 2, respectively.

Figure 7 shows typical details of the modified brackets.

As described in the FSAR, Section 3.7.2.1.7.1, the seismic inertia loads were obtained using a time-history analysis of a spring and lumped mass model of the auxiliary building.

Two horizontal models and a vertical model, shown in Figure 8, vere used in the; analysis.

A detailed analytical static model of the auxiliary building (Figure 9) was used to distribute seismic inertia forces and moments to various valls, diaphragms, and columns, as described in the FSAR, Section 3.8.2.4.

The effect of the change in weight on the seismic models due to the high-density racks was insignificant, since increase in global mass was determined to be less than 1'i.

Therefore, there is no change in the seismic responses and forces reported in the FSAR.

The pool walls were analyzed for local out-of-plane effects due to hydrostatic, hydrodynamic, and seismic loads using U.S.

Bureau of Reclamation tables for plates (Ref. 1).

Hydrodynamic effects vere determined based on the methods in TID 7024, "Nuclear Reactors and Earthquakes" (Ref. 2), and "Dynamics of Fixed-Base Liquid-Storage Tanks" (Ref. 5).

Thermal effects in the pool elements due to the increased thermal gradient generated from the use of the high-density racks were analyzed considering cracked concrete section.

The liner has been evaluated for loads and load combinations described tn

Response

15c.

The mathematical model used in the thermal evaluation consists of a set of springs representing the axial stiffness of the liner and flexural stiffness of the embedded

anchors, as shown in Figure 10.

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1

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2 NODE NLNASER PI ELEMENT NUMBER ROTATIONALDEGREE OF FREEDOM TRANSLATIONALDEGREE OF FREEDOM MASS POINT 1'5.8'1.5'.

EL 163'L.

140'IGID LINKTYP.

115'5.0'S EL. 108' PB p2 pi RIGID LINKTYP.

p2 27.5'LJSL 17.71.3'a NOTE TORSIONAL SOIL SPRING~

TRANS-LATIONAL SQIL SPRING SEE KQTE PS N-S 94)DEL E-N MODEL VERTICALMODEL

( HOSGRI ONLY )

FAN ROOM ROOF AT ELEV. I64 6

LLL CONTROL ROOM ROOF AT E'164 UNIT I

lB UNiT 2 FAN ROOIV. ROOF AT ELEV. I64 ~

~.,t' ELEV.140

~ ELEV. 115

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FIGuRE 9

DIABLO CANYON POV E~ P-AN UNITS I B 2 5-DIMENSIONAL MACR" STATIC MODEL

Table 1

AUXILIARYBUILDING SPENT FUEL POOL CONCRETE HALLS STRESS RATIOS l-M Stress

~m'~n QgZ~>(b)

Qgm~n

~~$

(b)

~Ra i (c)

A.

DESIGN EARTHQUAKE HALL AD HALL BC HALL CD HALL AB 25 85 100 100 100 25 85 80 80 299 220 155 250 240

~4 164 20 54

~4 664 113 146 145 g.4 2.6 3.4 2.7 2.7 DOUBLE DESIGN EARTHQUAKE HALL AD HALL BC HALL CD HALL AB

~l 85 100 100 100

~4 170 160 160

~4 370 260 420 410 2H

'U2 316 1,086 40 244 105 280 106 268 g.4 2.2 3.0 2.6 2.5 C.

HOSGRI EARTHQUAKE HALL AD HALL BC HALL CD HALL AB 1K 85 100 100 100 1K 230 130 330 270

~l 320 190 480 460

~4 493 60 220 199 559 979 197 339 324 1.5 1.4 1.6 (a)

For wall identification, see Figure 3.

Counterparts in Unit 2 are similar.

(b)

Axial demand effect 3s included in the capacities.

(C)

Stress ratio capacity/demand for shear or moment, whichever is smaller.

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OTHER LOADS CONSIDERED HYDROSTATIC OUT OF PU5E SEISNIC DUE TO POOL WATER SELF WEIGHT SEISNIC THERNAL EFFECT

Table 2

AUXILIARYBUILDING SPENT FUEL POOL CONCRETE STRUCTURE STRESS RATIOS (DE)(a)

~>>(b)

AB BC AD CE ED GF Basemat Homent

~f1~/f 195 220 225 145 iso 215 210 Shear 31 35 20 27 27 small Homent

~f1~f 220 245 245 220 250 260 275 V

1 Shear ELU 56 56 56 46 large Stress

~R 1.5 1.4 1.2 1.3 (a)

Stress ratio capacity/demand for shear or moment, whichever 3s smaller.

(b)

For wall )dent>f)cation, see F)gore 3.

Table 3

AUXILIARYBUILDING SPENT FUEL POOL CONCRETE STRUCTURE STRESS RATIOS (DDE)<a)

~11(b)

AB BC AD CE ED GF Basemat m

n V

1 Moment

~/f 265 295 305 195 235 285 265 Shear

~/

38 42 25 30 32 small Moment

~f~/

420 460 460 420 470 490 520 V

1 Shear 85 85 99 71 large Stress J&.h 1.6 1.6 1.5 2.2 2.0 1.7 2.0 (a)

Stress ratio capacity/demand for shear or moment, whichever is smaller.

(b)

For wall identification, see Figure 3.

I

Table 4 AUXILIARYBUILDING SPENT FUEL POOL CONCRETE STRUCTURE STRESS RATIOS (HE)(a)

~V11(b)

AB BC AD ED GF Basemat m n V

1 Homent 300 355 365 200 245 295 345 Shear 68 31 34 37 small ai Vl Homen 500 550 550 500 570 590 630 92 92 92 92 107 76 large trqss 1.7 1.5 1.4 2.5 2.3 2.0 1.B (a)

Stress ratio capacity/demand for shear or moment, whichever is smaller.

(b)

For wall identification, see Figure 3.

LINER DESI SN LINER DETAILS ARE SINILAR TO OTHER PLANTS LICENSED TENPERATURE EFFECT ON LINER IS EVALUATED, IT NEETS THE ACCEPTANCE CRITERIA OF ASNE SEC. III DIVISION 2,

'MTIALCLPtVA PANEL A ANCHOR I tANEL 5 Kgp4 agp S ac ANCHOR

$40 TATION S

ANCHOR OISPLACEMEHT

+~ANCHOR STIFFNESS K~p+STIFfNESS Of LINER PANEL A

~~STIFFNESS OF LINER PANEL 8

.SPENT FuEt OOL LlMER QDDEL FDFl THERMAt 4t YSIS FfGURE fO

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Table 5

AUXILIARYBUILDING SPENT FUEL POOL LINER STRAINS AND DISPLACEMENTS LINER PLATE STRAINS Liner

~~in Hall Floor Governing

~~d~m D+Ta+HE D+Ta+HE 0.00112 0.00156

~ill'~l(1 )

0.005 0.005 4.5 3.2 LINER ANCHOR DISPLACEHENTS Liner Governing

~~in

~~~m Qgm~n

~ll w~l(3)

"(2(

Hall Floor D+Ta+HE D+Ta+HE 0.01220 0.06200 0.01375 0.06200 5.2 4.5 (1)

From ASME BtEPV Code Section III, Division 2, 1983 Edition, Table CC-3720-1.

(2)

Safety factor is computed relative to the code allowable.

(3)

From ASME BLPV Code Section III, Division 2, 19B3 Edition, Table C-3730-1, using Su

0. 125 in. based on test results given in BC-TOP-1 Appendix B (Ref. 6).

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