ML20126G848

Forwards Summary Table Identifying Status of Pipe Supports for One Stress Problem (FW-04).Similar Tables Initiated for Other Stress Problems.Related Info Encl

ML20126G848
Person / Time
Site:	San Onofre
Issue date:	06/19/1984
From:	Rainsberry J NRC
To:	Charemagne Grimes NRC
Shared Package
ML20126G811	List: ML20126G807 ML20126G848 ML20126G877 ML20126G896 ML20126G914 ML20126G934 ML20126H000 ML20126H019 ML20126H078 ML20126H096 ML20126H128 ML20127C179 ML20127C183 ML20127C306
References
FOIA-84-885 NUDOCS 8506180165
Download: ML20126G848 (14)

Text

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- .. . i MEMO TO Chris Grimes June 19. 1984  !

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/ env ahasar.s e  !

Y je  ;

L j SUQXCT: Pipe Support Status Information l 1  !

i San Onofre Unit 1 (

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j Attached is a _ summary table identifying the status of pipe supports for one stress problem (FW-04). The information on this table in

combination with a piping isometric should tell you everything ,

) you want to know about the pipe supports on this line. We are

! oroceedina to prepare similar tables for the other stress problems in the Return to Service scope. If you have any comments on this

,I table. _please let me know as soon as possible.

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_T Jack Rainsberry '

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! . __ BELLS 4H W5 PDR - - - - - __.._._.._._ ...._ _._ ____

N i From _ _ . _ _ _ . __ _ _ . _ . . . . , _ ,

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i Sumary Table Listing All Active Supports For Line No. FW-04 a

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k ATTACHMENT 1 SUPPORT I.D. NUMBER is a unique hanger mark number used to identify each

, support. For example, the support I.D. number 51-02-0326-H005 refers to:

S1 - Support at SONGS-1 02 - Identifies general area of location in plant 032u - Identifies piping line number or which support is located H005 - Designates the hanger number.

DATA POINT is the nodal point used in modeling each support on the piping isometric (mathematical model).

TYPE defines the type and direction of each support such as Y rigid or X 7 snubber.

STATUS refers to construction status. The following statuses are used:

[ CX ,= Completed new support CM = Completed modification CR = Completed repair CN = Completed no change IX = Incomplete new support IM = Incomplete modification IR = Incomplete repair MAXIMUM STRESS RATIO defines the ratio of the capacity of the support to which it is loaded and hence, provides an indication of the margin of safety for each support. The support capacities are evaluated based l on the design requirements as defined in the ASE Code for Level D loads (attached as Table 1). In cases where departure from code allowables are taken for Return to Service conditions, an asterisk notation is povided by the support classification. i

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SUPPORT CLASSIFICATION refers to the categorization of the active supports.

This is described below:

Type A: Those supports which will remain below functionality limit through the DBE event.

Type B: Those supports which will' yield but will maintain load carrying capability.

Type C: Those supports which will fail in a brittle manner and will provide no load carrying capability.

ATTACHMENT L

.I Page Two )

For those existing supports which are classified as Types B and C, no stress ratio is provided indicating that these supports have either yielded (Type B) or failed (Type C). However, it is explicitly shown by means of the energy balance method that the yielding or failure of these supports will not impair the functionality of the piping and of the other Type A (qualified) supports. -

NOTES In this column, various notes are provided pertaining to whether the as-installed support is sufficient or further construction work is required. For those supports where construction is required, it is also indicated whether the existing designs are adequate or redesign or modification to existing designs is required.

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'l LISTING OF ALL ACTIVE SUPPORTS REQUIRED TO MAINTAIN PIPE FUNCTIONALITY LINE No. N-04 '

DATA adA XIMuu SUPPORT SUPPORT LD. TYPE STATUS STRESS CL A SSI- ATTACHED TO POINT NOTES RATIO FIC ATION INEL ASTIC BE AW5 SI-06-321-H0f0 255 X SMS IM 0.46 A no (r)

-H011 255 2 RGQ IM 0.62 A no III

-H008 260 V RGO IX 0.38 A no (2)

SI-05-322-H006 220 y RGO IM 0.93 A nn (2}

Sf-05-325-H005 536 X,Z SNS IX 0.76 A no (2)

SI-02-325-H077 540 V SFR IX 0.93 A no (f)

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-H021 550 X,V,2 SVB IX ---

A no (3)

-H005 604 V RGO CX ---

B yes (I)

-H00J 606 V RGO CX 0.99 A* no (;}

-H0f0 608 X,V,2 SMB IX 0.20 A yes ,

!!)

-H020 613 V,Z RGQ CX 0.17 A no gy}

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-H008 614 Y,2 RGO CR 0.29 A no gy}

-H007 676 V SFR Cy 0.96 A' no p)

NOTES:

1- Construction is not required. As-installed support is sufficient.

2- Construction is reouired. Modification to and/or instnifation as per Rev. O design is adequate.

3- Construction is required. Existing Rev. O design is not adeaunte/Rev. O cesign coes not exist. Redesign or rnodefication to existing design is requireo.

4-efndicates higher than code allowables have been used for return to service conditions.

5- Support is qualified as per Rev. O analysis. Requalification not performed.

I LISTING OF ALL ACTIVE SUPPORTS REQUIRED TO MAINTAIN PIPE FUNCTIONALITY l

1.lNE No. FW-04 (Continacd)

DATA MA xlMuW SUPPORT SUPPORT LD. TYPE STATUS STRESS CL A S$l- ATTACHED TO NOTES PO4NT A A ION INEL A STIC BE AMs Sf-02-325-H323 625 0.93 no (H524) (667)

V RGD CX A (;)

-H013 639 V,2 RGD CM 0.85 A yes (;)

-H019 658 V,2 RGD IM ---

C yes (1}

-H0ff 682 V, Z RGD CM 0.45 A yes (3)

SI-02-326-H005 708 X,V,2 SVS IX A yes I3I

-H012 713 V,2 RGD CX 0 I# A yes I

(1)

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\ 0 13

-H004 714 V,2 RGD CR A yes (1)

-H003 776 V SPR CM 0.75 A* yes (1)

-H009 739 V, Z RGD CM 0.38 yes A [r)

-HOIS 758 V, Z RGD IM C yes (,)

-H007 782 V,2 RGD 0.83 yes CM A <;j SI-02-329-H007 804

V RGD A " (2}

(60 CM

-H006 808 X,Y,2 SVS IX 0.21 A yes ,;)

NOTES:

1- Construction is not required. As-Installed support is sufficient.

2- Construction is required. Modification to and/or installation as per Rev. O design is adequate.

3- Construction is required. Existing Rev. C design is not adequate /Rev. O design does not exist. Redesign or modification to existing design is requirec.

4-elndicates higher than code allowables have been used for return to service concitions.

5- Support is qualified as per Rev. O analysis. Regustification not performed.

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LISTING OF ALL ACTIVE SUPPORTS REOUIRED TO MAINTAIN PIPE FUNCTIONALITY LINE No. ry_os frn f1,.,.,g)

SUPPORT LD. DATA WAXIMuu SUPPORT PotNT TYPE STATUS STREgg CLA S SI-RATeo FIC A TION ATTACHED TO NOTES INEL A STIC BE A Ms S1-02-329-H010 813 Y, Z RGO CX 0.24 A yes (1)

-H005 874 V,2 RGD CR 0.33 A yes (r)

-H004 816 V SPR CR 0.75 A yes (r3

-H007 838 V, Z RGO CM 0.78 A yes (1l

-Hoff 858 Y,2 RGO IM ---

C yes (f)

-H012 882 V, Z RGO CM 0.99 I'\ A yes (1)

-H013 890 V, Z RGO CM 0 80 iA yes (1)

NOTES:

1- Construction is not required. As-installed support is sufficient.

2- Construction is recuired.

per Rev. O design is adequate.Modification to and/or installation as 3- Construction is required. Existing Rev. O design is not adequate /Rev. O design does not exist. Redesign or modification to existing design is requirec.

4-Windicates higher than code allowables have been used for return to service conditions.

5- Support is quallfled as per Rev. O analysis. Re:::slification not perforrned.

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TABLE 1

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CRITERIA FOR ASSESSING LEVEL D SUPPORT CAPACITY Stress / Component Criterion Bending, Tension (1.2 Fy , stress Min buckling 0.7 Fu)and 2/3 critical Shear Fy = 0.8Fy < 0.42Fu St' ability (Compression) Fa . Resultant compressive stress F.S.

1.66 < F.S. < 1.92 Anchor F u AB = E F.S. = 4

• Welds Fw = 1.33 Sa I

\ where Sa = 18 kst for E60 electrodes and Sa = 21 ksi for E70 electrodes If unknown, use Sa = 18 ksi Standard Components Use Manufacturer specified Level D load allowables.

where Fy = yield stress at design temperature Fu = ultimate strength at design temperature F.S. = factor of safety 1

• On a case-by-case basis, a factor of safety of 2 is used for Return to Service allowables.

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! ATTACHMENT II STATUS NOTES EXPLANATION

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I 1  : Support qualifies as installed Support in plant prior to 1982 Construction on support may be incomplete 1

i I 2  : Kevision 0 design is required Support meets ASME Code for Level D loada Construction on support is required I 3  : Revision O design must be upgraded New support, when designed, will meet ASME code for Level D loads Construction on support is required C 1  : Support is complete

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Any support with a "1" in the NOTES column does not require any construction and is therefore available for inspection. All other supports are in an incomplete condition. l 4

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Date .

ROUTING' AND TRANSMITTAL SUP -

7/5/84 m (Ne_iding, Agency / Peat)mo. osce symner. ,.e. numeer, lani.is o.te Den g Larry Chandle'r, OELD g .

4.

• 5.

Action File Note and Retum Approval For Cleerence . Per Conversation.

As Requested -

For Correction Prepare Reph Circulate For Your Information See Me Comment investigate Signature .

Coordination .lustiv -

REMARKS .

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RE: SONGS 1 RESTART REQUIREMENTS' -

Attached are: -

l'. 8/11/82 Order, including ~ California notice

-2. Referenced 6/15/82 and 6/2.4/82 SCE letters 3.c 2/8/84 SER and 3/7/84 update on the criteria for the " restart" scope of. seismic upgrades -

4. Figure depicting the scope of the Hot Standby ~

system for restart

, Pleas,e l'et me know'when you wi.ll have a fair understanding of the findings and form required to support a restart. decision.

Thanks.

DO NOT use this form as a RECORD of approvals, concurrences, disposals, clearances, and similar actions FROM: (Neme, org. symbol. Agency / Post) Room No.--Blog. l Chris Grimes, SEPB . l X27464 8041-102 . 41 (Rev. 7-76)

• GPO: 1951 0 - 351-529 (232) FPMR (41 CF10101-11.ms onen**

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SAN ONOFRE UNIT 1 SEISMIC HOT STANDBY SYSTEM g PORV (2) m PRESSURIZER SAFETY J k VALVES V STEAM MAIN STEAM 2 O GENERATOR (3 LOOP)

. E FEEDWATER X >

FCV V A RPV RCP O

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\ AUXILIARY

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TEST CCb CHARGING C FEEDWATER PUMP PUMPS

/, PUMPS i V l g--->

l- - -> NI p __4 SPENT FUEL P00L l .

l AUXILIARY FEEDWATER STORAGE TANK NITROGEN BANKS (for air-operated valves)

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• ALL SYSTEM ISOLATION VALVES, VENTS AND DRAINS l . _ . _-. _. -- . . . . - - -.

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Q DRAFT 8/16/84 STATUS OF COMPLETION OF JUNE 24, 1982 COMMITMENTS - SAN ONOFRE 1 The June 24, 1982 letter outlined the activities for completion of seismic upgrading of San Onofre 1 to the 0.67g Housner spectra. The status of each aspect of this program is described below.

A. Site Ground Motion By letter dated September 16, 1982, the staff concluded that the 0.679 Housner ground response spectrum with a 10% increase in the 0.07 to 0.25 second period range and the 0.44g Housner ground response spectrum with a 10% increase in the 0.05 to 0.15 secomf period range are the r- appropriate horizontal and vertical free motions for seismic reevaluation.

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On August 16, 1984, the staff reconfirmed its decision on the vertical 1

ground motion. Therefore, this activity is complete.

B. In-situ Soil Conditions '

The soil conditions have been characterized and the effects on structures, systems and components under seismic loading have been evaluated. Some modificatiors were made, such as to the auxiliary feed-water pump supports and the 480v room foundation as a result. The staff has concluded that the seawall will remain functional following the postulated ea.rthquake. Review of the settlement aspects is still continuing; however, this issue does not need to be resolved for restart.

C. Structures The analysis of safety-related structures has been completed.

Modifications have been made to reactor auxiliary building connections, turbine building bracing and intake structure walls. The staff still C/L3

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has some questions regarding the fuel storage building, but these questions are not of such significance as to require resolution prior to restart.

The degradation of intake structure rebar will have to be assessed, but this structure is not required to maintain a hot standby condition. The licensee is proceeding to install steel plates on the intake structure

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walls to enable the structure to withstand a 0.679 earthquake with no credit for the rebar on the inside of the walls.

C.8 Masonry Walls The analysis methodology has been validated by a test program to show that masonry walls will not catastrophically fail as a result of the postulated earthquake. Some modifications were made to connections and

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stiffening braces were installed in locations where excessive deflection of the wall might affect attached equipment. A lotter describing the licensee actions relative to dsflection of masonry walls will be provided in September 1984.

C.9 In-situ Response Spectra This issue is resolved per the July 7, 1983 trip report.

D. Mechanical Equipment and Piping Systems and components required to prevent accidents and to reach a hot standby condition have been upgraded. A new auxiliary feedwater

' storage tank and new AFW piping have been installed. The upgrading of supports of remaining systems and components normally used for cold shutdown and for accident mitigating systems have not yet been completed.

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, E. Electrical Raceways and Conduits Most of the conduit and cable tray modifications have been completed.

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Based on the upgrading program being conducted by the licensee and the modifications to date, it is concluded that this equipment will survive the postulated earthquake.

F. Anchorace of Electrical Equipment Licensee evaluation and modification of anchorages of safety-related electrical equipment is complete. Staff review is continuing.

G. Seismic Backfit Project There are no open items on this review (see July 7,1983 letter).

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