ML20052H402

Summary of 820407 Meeting W/Energy Technology Engineering Ctr in Bethesda,Md Re Proposed Reinstallation Program for 26-inch & 36-inch Diameter Buried Svc Water Piping

ML20052H402
Person / Time
Site:	Midland
Issue date:	05/12/1982
From:	Hood D Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
ISSUANCES-OL, ISSUANCES-OM, NUDOCS 8205200332
Download: ML20052H402 (24)

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4 REC 5Iv50 93 MAY 18198g, 32 t'AY 12 E2 i

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APPLICANT: Consumers Power Company to FACILITY:

Midland Plant, Units 1 and 2

SUMMARY

OF APRIL 7,1982, TELtPH0rlE CONFERENCE AND APRIL 16, 1982, MEETING ON UNDERGROUllu PIPES On April 16, 1982, the NRC Staf f and its consultant, Energy Technology Engineering Center (ETEC), met in Bethesda, Maryland with Consumer Power Company (the applicant) and Bechtel to discuss underground pipes at the Midland Plant, Unit; 1 and 2.

Meeting attendees are listed by Enclosure 1.

Handouts and viewgraph slides used during the applicant's presentation are shown by Enclosure 2.

The nueting reviewed inforrution previously forwarded by the applicant's letter of March 16, 1982, including the proposed reinstallation progran for 26-inch and 36-inch dianeter buried service water pipes, and the future monitoring program of

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the existing buried service water piping.

The reeting also included supplenental infortution contained in the applicant's letter of April 15, 1982.

The April 15, 1982, letter responds to information requested by the tiRC's Mechanical Engineering Branch by a telephone conference call on April 7,1982, following its review of the

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March 16, 1982, submittal. Participant's in the April 7,1982, conference call are listed by Enclosure 3.

The staff had requested a more thorough discussion of the load conbinations, inputs and allowable values for the reinstallation progran for 26-inch and 36-inch diameter pipes. The applicant responded using handout 1 (see Enclosure 2 of this sunnary report).

The applicant noted during the discussion that monitoring of rattle-space at structural penetrations is not proposed as part of the operational life nonitoring program.

The staff responded that the need for such nonitoring was still under consideration, and that sore confirnatory nonitoring and reporting would probably be required by the staff upon conclusion of its review. One pipe, in particular, was noted to be of interest, 26-OHBC-15, which enters the north wall of the Auxiliary Building. The applicant agreed to address 26-OHSC-15 for possible future contact at the building annulus.

This will include soil con-ditions in the imediate area and the piping configuration as it relates to i

settlement.

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At the February 18, 1982, hearing and in the April 7,1982, conference call, the l

NRC staff had requested ovality measurements of the piping affected by the rein-stallation program. The applicant replied that its April 15, 1982, letter commits i

that cvality neasurenents will be taken both before installation and af ter the pipe is rebedded.

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J 2-The NRC had requested clarification whether the selsnic analyses for piping had considered both horizontal directions.

Bechtel replied that both directions had been included in the analyses. Mr. J. Kane noted fron discussions with ttr. P.

Hadala (NRC consultant) that use of a shear wave velocity of 5000 ft/sec at the 4

deeper layers of the analyses roodel is acceptable since the sensitivity of this value is such that use of a different value like 4000 ft/sec would not make a significant difference to the analyses results. Review of the seisnic analysis results by ETEC was noted to be continuing.

The applicant finds that reinstalled pipe will be subjected to settlement loads based on future predicted settlerent of not rore than 1.5 inches. The meeting discussed the runner in which this 1.5 inches of settlement is distributed in the piping design analyses.

The applicant assumes a displacenent of 1.5 inches at the end of a 30 foot cantilever. The applicant finds tnis technique to yield the worst stress case, since the highest stress is at the piping anchor point.

The applicant also feels that future settlenents following rebedding will be uniforn over the entire rebedded length.

The staf f reviewed the structural nodel used by Bechtel for one analysis of rattle space clearance and compared this model with its building isometric layout. A t

discrepancy was found in that the nodel ends at an anchor point. No such point appears to exist on the isonetric representation. The applicant will explain the reasons and livlication for this modeling assunption.

The transition zone between the new fill beneath reinstalled piping and existing fill was discussed.

Strain gauge nonitors will be located on the piping in this zone.

Separation distance between ronitors, if any, is not yet established.

4 Settlement nonitors will also be located downstrean in the existing fill.

The applicant will provide an analysis and program at the fill transition point for the reinstalled 26-inch and 36-inch diareter lines.

The applicant described the stress contributions of the individual loads (dead-weight, overburden, thernal, settlerent, seisnic and hydraulic) using Handout 2 (see Enclosure 2). The NRC staf f questioned the lack of correlation between the thernal stresses of sheet 1 of Handout I with the thernal stress of Handout 2.

The applicant will re-examine the stresses and allowables in the two tables and resubmit to the NRC as appropriate.

The staff noted that a technical specification or license condition would be generated to assure that sustained loads will not be located over seismic Category I lines during plant life. The staff suggested that the applicant describe its intended control measures to this end and propose a suitable specification.

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. j The applicant's subnittal of fiarch 16, 1932, indentified a new underground i

seismic Category I line not previously identified to the HRC. The new lines (48"-0118C-2 and 48"-0YJJ-1) route returning service water to the cooling tower during the sunner as described in FSAR pages 9.2-8 and 9.2-10.

The Ifnes are seismic Category I to the soil anchor point about 10 feet beyond the Service llater Puop Structure. The applicant further discussej the 48" lines as pre-sented in Handout 3.

The staff nians further review of the applicant's termiral end analysis and the effects of anchor point nnvecent.

Using Handout 4, the appifcant discussed the monitoring station neasured ovality and corresponding neridional strain for the 26-inch dianoter service water lines which are not to be rebedded. The strain value to be allowed at each nonitoring station is the difference between the allowable strain value of 0.48% (corres-ponaing to an ovality of 4%) and the calculated strain for the existing ovality.

The staff noted that these differences range in value from 0.08% to 0.27%. The applicant will provide the f RC further discussion of the accuracy of the strain gauges and the uncertainty of the ovality-to-strain correlation with respect to the proposed allowable station readings.

The meeting also discussed the redundancy and locations of strain monitors for the future monitoring progran of the existing buried piping not to be rebedded. The appitcant proposes two strain nonitors along the longitudinal axis at the point of maxinun existing ovality. The applicant will provide a sutrif ttal describing strain gauge location and details. The staff generally concurs that two gauges nay be adequate in areas whcie neasurenents have shown no abrupt changes, but additional gauges may be needed otherwise. The staff also noted that a separation distance between strain gauges of about one pipe diameter would probably be appropriate.

Mr. J. Kane noted that geotechnical engineering connents for the March 16, 1982, submittal would be provided by telephone call in the near future.

The applicant will provide further evplanation for a proposed technical specifi-cation, including the action to be taken if a limiting condition for operation is reached.

The applicant will also verify that no other buried sefsnic Category I lines exist at the Midland site which have not been reported to the HRC, considering the reasons for not originally including the 48" diameter lines.

Darl S. Hood, Project Manager Licensing Branch No. 4 Division of Licensing

Enclosures:

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MIDLAND Mr. J. W. Cook Vice President Consumers Power Company j

1945 West Parnall Road Jackson, Michigan 49201 cc: Michael I. Miller, Esq.

Mr. Doo van Farrowe, Chief Ronald G. Zamarin, Esq.

Division of Radiological Health Alan S. Farnell, Esq.

Department of Public Health Isham, Lincoln & Beale P.O. Box 33035 Suite 4200 Lansing, Michigan 48909 1 First National Plaza

Chicago, Illinois 60603 William J. Scanlon, Esq.

2034 Pauline Boulevard James E. Brunner, Esq.

Ann Arbor, Michigan 48103 Consumers Power Company 212 West Michigan Avenue U.S. Nuclear Regulatory Commission Jackson, Michigan 49201 Resident Inspectors Office Route 7 Ms. Mary Sinclair Midland, Michigan 48640 5711 Summerset Drive Midland, Michig3n 48640 Ms. Barbara Stamiris 5795 N. River Stewart H. Freeman Freeland, Michigan 48623 Assistant Attorney General State of Michigan Environmental Mr. Paul A. Perry, Secretary Protection Division Consumers Power Company 720 Law Building 212 W. Michigan Avenue Lansing, Michigan 48913 Jackson, Michigan 49201 Mr. Wendell Marshall Mr. Walt Apley Route 10 c/o Mr. Max Clausen Midland, Michigan 48640 Battelle Pacific North West Labs (PNWL)

Battelle Blvd.

Mr. Roger W. Huston SIGMA IV Building kite 220 Richland, Washington 99352 7910 Woodmont Avenue Bethesda, Mc yland 20814 Mr. I. Charak, Manager NRC Assistance Project Mr. R. B. Borsum Argonne National Laboratory Nuclear Power Generation Division 9700 South Cass Avenue Babcock & Wilcox Argonne, Illinois 60439 7910 Woodmont Avenue, Suite 220 Bethesda, Maryland 20814 James G. Keppler, Regional Administrator U.S. Nuclear Regulatory Comission, Cherry & Flynn Region III Suite 3700 799 Roosevelt Road Three First National Plaza Glen Ellyn, Illinois 60137 Chicago, Illinois 60602 Mr. Steve Gadler 2120 Carter Avenue St. Paul, Minnesota 53108

Mr. J. W. Cook cc: Commander, Naval Surface Weapons Center ATTN:

P. C. Huang White Oak Silver Spring, Maryland 20910 Mr. L. J. Auge, Manager Facility Design Engineering i

Energy Technology Engineering Center P.O. Box 1449 Canoga Park, California 91304 Mr. Neil Gehring U.S. Corps of Engineers NCEED - T 7th Floor 477 Michigan Avenue Detroit, Michigan 48226 Charles Bechhoefar, Esq.

Atomic Safety & Licensing Board U.S. Nuclear Regulatory Commission Washington, D. C.

20555 Mr. Ralph S. Decker Atomic Safety & Licensing Board U.S. Nuclear Regulatory Commission Washington, D. C.

20555 Dr. Frederick P. Cowan Apt. B-125 6125 N. Verde Trail Boca Raton, Florida 33433 Jerry Harbour, Esq.

Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission Washington, D. C.

20555 Geotechnical Engineers, Inc.

ATTN: Dr. Steve J. Poulos 1017 Main Street Winchester, Massachusetts 01890

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ENCLOSURE 1 ATTENDEES 4/16/82 4

NAME ORGANIZATION Darl Hood LB #4/NRR i

Joseph Kane NRC, NRR, DE, HGEB l

J. A. Itooney CPCo F. C. Cherny NRC/DE/MEB W. P. Chen ETEC i

flark Hartzman NRC/DE/!!EB Dennis Budzik CPCo Bob Bosnak NRC/DE/MEB D. F. Lewis Bechtel Bill Cloutier CPCo Jim !!eisenheimer CPCo H. H. Fontecilla Bechtel 1

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ASME CODE CHEG - STRESS SUMMA F0E BURIED SERVICE WATER FIFING (Stresas in psi)

Normal Eg 8( }

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Lyset Eq 9 Code C 06 Thermal Fq 10 Ac t uel Allowable Actual Allowable Actual Allowable Actual Allowable Line Number Desc ri pt ion Stress Stress Strees Stress Stress Stress Stress Stress 36/26"-0HBC-15 SW Supply 10.442 17,500 14.060 21,000 20,536 42,000 5,214 26.250 3 M 26"-OllB O-16 SW Return 10.442 17,500 15.505 21,000 34,383 42,000 10,42n 26,250 36/26"-03180-19 SW Supply 10.442 17,500 17,190 21,000 34,953 42,000 10,814 26,250 36/26"-0118 C-20 SW Baturn 10,442 17,500 17,190 21,000 35,232 42,000 21,613 26,250 26"-OH B C-5 3 SW Supply 5,842 17,500 9.538 21.000 21,478 42,000 12.513 26,250 26"-010C-54 SW Return 5,842 17,500 9.318 21,000 26,323 42,000 25,009 26.250 NOTES:

l 1.

Actual stresses are based on calculations using 3/8-inch us11 pipe 2.

Pipirw strees eusmaries:

I a.

Equation 8 Stresses included = design pressure, weight and sustained loads (includes overburden)

Allowable stress = 1.0S - in acc rdance with ASME NC-3652.1 and Section 111. Division 1. Appendix 1 h

4 b.

Equation 9 Stresses included = peak pressure, weight and sustained loads (includes overburden), occasional load (OBE)

Allowable stress = 1 2S - in acc rdance with ASME NC-3652.2 and Section III, Division 1. Appendia 1 h

c.

Code Case 1606 Stresses included = peak pressure, weight and sustained loads (includes overburden), occasional load (SSE) 4g Allowable stress = 2.4S - in ace rdance with Code Case 1606 and Section 111. Division 1. Appendia 1 h

d.

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1. Y Stres ses included = thermal expansion, anchor movement (OBE)

Allowable stress

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- in accordance with ASME NC-3652.3 and Section III, Division 1. Appendix 1

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4/14/82

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PRELIMINARY RESULTS OF WALL PENETRATION ANALYSIS Seismic Disp.I }

. Disp. Due to( }

. Annulus at Wall at Wall 1-1/2" Settlement i

Line Penetration (in)

Penetration (in) 30' from Wall (in)

Ma rg in ( in)

Number (A)

(B)

(C)

A-(B + C) 3 6"- OllB C-15 2.625 0.1741 0.204 2.2469 3 6"- OllB C-16 2.625 0.1801 0.0705 2.3744 3 6"-OllB C-19 2.625 0.3361 0.204 2.0849 36"-01180-20 2.625 0.7220 0.1935 1.7095 2 6 "- OllB C-5 3 2.0 0.163 0.2505 1.5865 0.163 0.2505 1.5865 2 6"-OllBC-5 4 2.0 NOTES:

(1) Seismic displacement was determined by combining the absolute values of the following four motions:

Building movement - lateral and vertical a.

b.

Soil movement

- lateral and vertical c.

Pipe in soil

- lateral and vertical d.

Pipe in building

- lateral and vertical The lateral and vertical absolute sums were then combined by the square-root-of-the-sum-of-the-squares me thod.

(2) Settlement displacement is. the pipe displacement at the penetration because of 1-1/2" of settlement 30 feet from the building.

Jhed 2.

4/15/82

l & ?rs 7 Cu,lMerre - l PRELIMINARY RESULTS OF TERMINAL END ANALYSIS I1I Allowable Maximum Stress Settlement at Line Stress 3S for 1-1/2" Settlement 30' for Stress c

Number

( ps i. )

30' from Wall (psi) to be 3Se (in) 3 6"-O llB C-15 52,500 9,374 8.401 3 6"-OllB C-16 52,500 8,403 9.3717 4

3 6"-OllB C-19 52,500 9,374 8.401 3 6"-OllB C-2 0 52,500 8,403 9.3717 l

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kb h l-h, xw3 48-INCH DIAMETER SERVICE WATER LINE TO COOLING TOWER (LINE 48"-OHBC-2/48"-0YJJ-1)

This line is used to route the returning service water to the cooling tower in lieu of discharge to the emergency cooling water reservoir.

Inside the service water pump structure (SWPS), there are two Seismic Category I butterfly valves isolating this line from the normal routing to the cooling pond.

Functionally, the class'. change is at the butterfly valves; however, design practice is to extend the pipe class to the first anchor point beyond the safety /non-safety isolation valves.

This anchor point was the soil outside the structure.

At the class change, the line also changes from carbon steel to concrete.

The routing of this line is shown in drawings:

M-183, Sh 1 M-183, Sh 2 M-184, Sh 1 M-184, Sh 2 M-618, Sh 1 The analysis of the piping system inside the SWPS included a terminal end analysis which continued to an assumed anchor at the change from steel pipe to concrete pipe.

f

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4HG&di4HfftE 4 TABLE 1.0 Monitoring Station Ovality and Corresponding Strain Line: *26-OHBC 15 Alle able Strain =.k8%

Figure 1 (n -**h Ih lOICh

Reference:

olle-d/t St at ion

• Measured ovality (%)

Meridienal Strain (%)

,[gYj)9

~

1 2.3h 0.35 0- 1J 2

1.88 0.32 O.IG 3

2.3h 0.35 O. / J h

2.3h 0.35 O./J j

5 1.2h 0.25 o'. 2 3 Line: 26-0$BC16

Reference:

Figure 2 1

2.18 0.3h O. I &

2 2.18 0 3h O. ! *t 3

2.3h 0.35

p. / 3 h,

2.18 0.3h

v. J 't 1

5 1.12 0.23 0 25 Line:

26-OHBC 53

Reference:

Figure 3 1

1.LO 0.27 82I 2

2.96 0.ho l p, o]

3 2.18 0.3h p, f y.

4 k

2.18,

O!3h p, g p Line: 26-0F3C Sh

Reference:

Figure h 1

2.50 0.36

o. I L 2

2.50 0.36 O. / 2 4

3 2.18 0.3h

o. / P i

h 2.03 0.32

p. / G 5

2.50 0.36

p. / E 6

2.03 0.32

0. I G Line:

26-OF3C 55

Reference:

Figure 5 1

2.03 0.32 0, i G 2

1.h7 0.27 p, g f 3

1.56 0.28

1. • (o 4

1.56 0.28 p,

Jarti 4 L b

~

2 X*

Statien*

Meaeured Ovality (5)

Meridional Strain (5)

Line 26-05 C 56

~

Reference:

Figure 5 1

1.09 0.22

0. E 2

1.87 0.31 C/7 3

0.90 0.21

o. 2.7 h

2.h9 0.36 v.1 Z Line 26-0EC 19

Reference:

Figure 6 1

1.87 0.31 C. i 'l 2

1.87 0.31 P. / 7 i

3 1.87 0.31 0./7 h

0.89 0.21 0,27-Line 26-OH3C 20 Referenc e: Figure 6 1

1.87 0.31 0./7 2

1.87 0.31 C. / 7 3

1.87 0.31

c. / 7 h

1.79 0.30

p. / Y-1 L

2

• The station numbers are numbered from left to right from the given reference fLure ftoH h ve h I h,/ 4 t 2. /c He V, "fa,f$re Mo,,;t opin froyed.

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n EHCLOSURE 3 TELEPH0flE CONFERENCE CALL PARTICIPANTS APRIL 7, 1982 CPCo BECHTEL NRC J. Mooney D. Lewis-R. Bosnak

-J. Schaub A. Boos D. Hood If. Cloutier M. Hartsman J. ficisenheiner F. Cherney J. Reisburg P. Chen (ETEC) s F

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...............,,,.;(

N7;C FORM 318 610/80) NRCM O240 OFFICIAL RECORD COPY.

' = =-a28 s24 :

MEETING

SUMMARY

DISTRIBUTION 13.g 1

'311 Docket No(s): L50-329/330 NRC/PDR Local PDR TIC /NSIC/ TERA LB #4 r/f Attorney, OELD OIE E. Adensam Project Manager D. Hood Licensing Assistant M. Duncan NRC

Participants:

D. Hood J. Kane F. C. Cherny M. Hartzman B. Bosnak P. Chen (Consultant - ETEC) bec:

Applicant & Service List