ML20202B564

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Rev 4 to Procedure CP-EI-4.0-13, Control of Stress Analysis for Pipe Support Engineering. Related Info Encl
ML20202B564
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 01/05/1982
From:
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML18052B537 List: ... further results
References
FOIA-85-59 CP-EI-4.0-13, NUDOCS 8607100332
Download: ML20202B564 (21)
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TEXAS UTILITIES SERVICES INC. INSTRUCTION REVISION PAGE CP-EI-4.0-13 4

1-5-82 1 of 16 CONTROL OF STRESS PREPARED BY [ [ M-ANALYSIS FOR PIPE

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SUPPORT ENGINEERING l

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1.0 REFERENCES

1-A CP-EI-4.0-1 Design and Design Verification Control for Pipe Support Engineering FOR 230m.nn my HISIGRICAL FILR 2.1 PURPOSE The purpose of this instruction is to address the necessary control functions for stress analysis of safety class piping.

2.2 SCOPE These enaineering instructions cover class 2 and 3, 2" and 1

smaller pipe and certain 21/2" and larger class 2 and 3 lines 1 }\\

which fall within the parameters of the criteria.

Documents C

hich can be used for determining the work scope can be identified

\\h rom Attactsnent 1 of the Gibbs and Hill letter GTN-43993 C0 afety Class Lines Qualifying for Non-Computer Analysis),

P 5, (Piping Information Tracking System), the Gibbs and Hill Li No. - Stress Problem Number correlation, and any correspondence ng or deleting specific line numbers.

All Class 2 and 3 lines identified as being in the site scope shall be analyzed in accordance with the Gibbs and Hill K

Simplified Analysis Criterir..

Forms DHE-5 and DHE-13 thru DHE-20 have been developed to assist the Stress Analysis Engineer in his work functions.

2.3 RESPONSIBILITY The CPP Pipe Support Engineer (PPSE) is responsible for providing technical direction and administrative guidance to the Pipe Support Engineering Organization and the general implementation of this instruction. The Chief Engineer (s) has or have been delegated the responsibility for ensuring the specific implementatior, of the activities described herein, um P A'-85-59 GARDE 85-59 PDR

TEXAS UTILITIES SERVICES IllC.

INSTRUCTION REVISION PAGE CP-EI-4.0-13 4

1-5-82 2 of16,

2.3 RESPONSIBILITY (Conti6ued)

Where specific individuals are designated by title in this instruction, it shall be understood that designees may be delegated I

to act in that capacity.

!.l j

3.0 INSTRUCTION I

EDUAKOHDN'1 3.1 DESIGN PREPARATION 3.1.1 Obtain a copy of the current revision of the "BRP" and any outstanding

" CMC's".

l1 l

.12 Pull the required isometric folder from the fil;e and insert an 4

"OUT" card with the date, isometric number, and initials.

If a l'

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file does not exist, the Administrative Supervisor will create one.

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The initial on the out card is necessary to insure that all CMC's

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written after the file is pulled are distributed to the analyst.

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.1. 3 eck the reference file for data on any valves, instruments or j

connecting equipment shown on the isometric.

If none is available, obtain from DCC.

i 3.1.4 Refer to the simplified analysis scope list to detemine design

'. I parameters and criteria to be used in the analysis.

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8 I

3.1. 5 Refer to the appropriate section of specification 2323-MS-46A for identification of pipe properties from the pipe specificatien indicated in the line number.

j g 3.1.6 Refer to the piping composite drawing referenced on the "BRP" to detemine piping and equipment located in the vicinity of the line to be analyzed.

l 3.1. 7 Che-k the pipe routing in the field to verify possible pipe support locations.

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3.2 DESIGN i

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TEXAS UTILTTIES SERVICES It!C. INSTRUCTION REVISION PAGE CP-EI-4.0-13 4

1-5-82 3 of 16 l

3.2.1 Unless specific data is given, seismic displacements at terminating equipment are assumed negligible. Thermal displacements at tenninating equipment must be calculated if this information is not provided.

3.2.2 Seismic and thermal displacements at connecting rigorously analyzed piping shall be reviewed. The section supervisor should be consulted for this infonnation.

3.2.3 Nozzle loads on equipment shall be calculated. ! Supports should be located such that these nozzle reaction loads are as low as possible.

If the calculated loads exceed the pendor allowables, this should be documented on the analysis cover, sheet and in the system punch list.

Discrepancies will be reso1'ved with the vendor at a later date.

i

.A 3.

all lines connecting to rigorously analyzed piping may have en partially included as over lap in the analysis. The lowing rules govern inclusion in the analysis:

l D = 1arger pipe size (run) d = smaller pipe size (branch) i D y 8": 1>f:P branch is included in the analysis f f 3 ranch is excluded from the analysis b

17 f 7 f branch is included in the analysis j

D l-6":

f f f branch is excluded from the analysis If the branch has been included in the analysis of the pipe run, an investigation shall be made to determine support requirements on the branch piping. Also, outside organizations may have issued support designs for the over lap area and this should be checked.

I 3.2.5 Generally, interfacing between two isometrics can be done by l

over lapping two supports in each direction for both isometrics.

I i

3.2.6 Gang supports should be used where possible. When this is done, it should be stated on the cover sheets of all the involved analysis packages giving the corresponding support and isometric numbers. All gang support feasibility studies should be coordinated i

with the appropriate pipe support design section.

i 1

TEXAS UTILITIES SERVICES lilC.

INSTRUCTION REVISION PAGE 4

1' O

CP-EI-4_012 4 of16 3.2.7 If rigorous stress anhlysis is deemed necessary the interface with the Site Stress Analysis Group shall be through the group supervisor only.

3.2.8 All notations on the Support Location Isometric shall be standard as shown below:

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k DIRECT,10NAL SUPPORT SPRING SNUBBER

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MODIFIED RIGID 3.2.9 Wherever possible supports shall be numbered in sequence from one end of the line to tne other. Separate support numbers i

shall be given to rigid, snubber, M-Rigid, and spring supports at the same location t ad shall be separated dimensionally as shown below for ease of installation.

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8 3.2.10 Unless otherwise noted, the field installation tolerance on support placement is + 6".

Consequently the seismic and deadweight I

span should be at least 6" under the allowable.

If the support must be located more exactly, place an asterisk (*) beside the

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TEXAS UTILITIES SERVICES IllC.

INSTRUCTION REVISION PAGE CP-EI-4.0-13 4

1-5-82 6 of 16 3.3.2 The pipe stress analysis engineer shall initial and date each l

DHE-4 calculation sheet and all applicable forms in the " CALC" Block, make a check copy of the analysis package and forward the package to the section supervisor.

3.3.3 The section supervisor shall assign the package to an authorized i

design verifier.

,i 3.3.4 The design verifier shall make his/her comments on the check I

copy of the analysis package and initial each sheet of the check copy in the "CHKD" block. The package shall be returned j

to the originating stress analyst for re'solutia'n of any comments.

I

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3.3.5 Upon completion of the design verification, the design verifier i

'8 shall initial the original of each calculation sheet and all applicable forms in the "CHKD" and "D.V." blocks. The package shall then be returned to the section supervisor.

t 3.3.6 An authorized engineer shall signify his approval of -the analysis package by initialing and dating form DHE-14 in the approval i*

block.

3.3.7 The completed package shall'be forwarded to the support design section.

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3.3.8 If reanalysis is req red for any reason it shall be performed in the same mann s escribed above.

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TEXAS UTILITIES SERVICES INC.

INSTRUCTION REVISION PAGE 4

1-5-82 5 of 16 CP-EI-4.0-13 3.2.10 (Continued) support location dimension which will mandate an installation tolerance of + 1/2". Also any mandatory axial supports located near an elbow shall have an asterisk (*) beside its location dimension.

3.2.11 Global axis on support location isometrics shall have the positive "X" axis pointing north.

In case of skewed piping the forces i

shall be indicated in local axis.

i 3.2.1],, Loads due to relief valves shall be added to seismic loads by I

using the absolute value.

Relief valve loads remain the same i

for both 1/2 SSE and SSE Conditions.

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\\In the column for " Support No." on Load Sumary Sheets the ollowing should be included:

1 4

,, r.

Mode point, partial loads, direction end type of

,j T'bf support (e.g. X-rigid, Y-snubber, X-Z rigid, etc.)

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3.2.14 Loads on'the load sumary sheet shall be rounded off to the lg higher whole number.

(e.g. 49.3d becomes 50#)

1 3.2.15 Spring and/or snubber movements shall be included on the

[

Load Summary Sheets.

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3.2.16 For rigorously analyzed piping a note shall be placed on the l

isometric which reads'"This ISO is computer analyzed".

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3.2.17 All assumptions and references used in the analysis sija11 be documented.

3.3 DESIGN VERIFICATION

(

l 3.3.1 All open items shall be documented in the system punch list.

The analysis supervisor shall insure that these punch list items i

are periodically reviewed and cleared.

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3.2.4.3 approrizate criteria o:! Flezihili:2 I

I 3.2.4.4 Einiana Spam seguired j

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s, i 3.L4.5 feed.'a w Lcais e

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Design Guidelines I

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4.1 Deadwei5ht 4.1.1

, suppe=t spacing Q

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4 t!=

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4.1.2 Su;;s=t Loads

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4.1.2.

lachog c: equipse=t ac=sies J

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4.2 SeisaLc L

4.2.1 Seissi= :sst:sist spacing

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4.2.1.1

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4.2.1.2 Tess

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7 fi:st late:a1 supyc=t of a see

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4.2.1.3 4.2.1.4 2ednes:s 4 z 1.5 z ta=a: s=>>=== c1=se t.

ed== =

O 4.2.1.6 Conce=trated weights

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P pi=g cos;csamts vis.h 5.2.7.

i 4.L t.7 Cthe:

ki:

4.2.1.8 seissi: :sst=sists at the valves I

4.2.1.9 Talve with c;e ators

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4.2.1.10 2estraists ca the valve body 4.L 1.11 r.1:ectic=s of seismic rest..alass

4. 2. 1. 12 1:ial restreists

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4. 2. 1. 13 Length ci s;as in all three di=ee. ions i.

1 i

t n

I k'

4.2.1.14 La:;e =adius cu: vata:s

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l

4. 2. 2 Dea 0%es%.41 as.d Zeismis Z u a p o s.t L e e el Ce e s w d a +o C M t t.'.

1 Fev w uLk tosq1 4.2.2.1 C a f e w ( a t,*o u Fe 1.= w d4, z, s

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4.1. 2. 2 N e m og La.p h g e y,

&. 2. 2. & AnchdzJ cr. e gu s'A ma u t vo t2. taa 4.3 2hersal tryazzina and Ancho: Boresea s s.

3

4. 3.1

'lhe: sal expansien loop L

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Nr C \\ '20. / 0 7 f43i la cc Ii:3'l Og 1h 4.3. 2 sialans spas : squired F 4 ='..S 4.3.3 31514 :ss.:si=t losa.s s

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' 4. 3. s 2 aamis==ed loads is: two spa.as g ' #

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4. 3. 5 '

sahatitute sashbe=s fo: rigid sappa: s.

4.4 c=ita=ia fo: design welded lag stuchaest.s i

4. s.1 st=sas evaluatism is: weld lag stuchaent.s K.

Procadare fc: ap;11 satis =

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Rafs=ancas S.

Apps=diz 1 O

7 9.

Appe:Liz y 14.

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