ML20195F554
| ML20195F554 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/27/1983 |
| From: | TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | |
| Shared Package | |
| ML20195F283 | List:
|
| References | |
| FOIA-85-59 CP-EI-4.0-13, NUDOCS 8606120176 | |
| Download: ML20195F554 (6) | |
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TEXAS UTILITIES SERVICES INC.
I h w d ION REVISION ISSUE PAGE e-M/
DATe f'
CINrBO CP-EI-4.0-13 9
10-27-83, 1 of 6
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\\ CONrFOL OF STREb5 ANALYSIS l
PREPARED BY d A.c EUR PIPE SUPPORT DUINEERDG g
APPPOVED BY w [.
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1.0 REFERENCES
1 - A CP-EI-4.0-1 Design and Design Verification Control for Pipe Support Ehgineering 1 - B 2323-MS-200 Design Specification for all ASME Section III, Code Class 2 (n 3 Piping 2.0 GENERAL 2.1 PURPOSE The purpose of this instruction is to address the necessary control functions for stress analysis of safety class piping.
I 2.2 SCOPE nese engineering instructions cover class 2 and 3, 2" and smaller pipe and certain 2 1/2" and larger class 2 and 3 lines which fall within the parameters of the criteria. Eccuments which can be used for determinirs the wrk scope can be identified frem Attachment 1 of the Gibbs and Elli letter GTN-43993 (Safety Class Lines Qualifyirs for N)n/gter Analysis),
Hanger Installation Tracking System (HITS), the Gilts and Hill Line No. - Stress Problem Number correlation, and any correspondence adding or deleting specific line nu:ters.
All Class 2 and 3 lines identified a:s being in the site scope shall te analyzed in accordance with the Gibbs and Hill Simplified Analysis Criteria or conputer programs (ADLPIPE or SUPERPIPE). Forms CHE-5, and DHE-14 thru CEE-22 have been developed to assist the Stress Analysis Engineer in his work functions.
2.3 RESPONSIBILITY FOIA VV technical direction an$gineer (PPSE) is responsible for providing We CPP Pipe Support En administrative guidance to the Pipe
%# V Support Engineering Crganization and the general implementation of this instruction. W e Chief Engineer (s) has or have been
( si delegated the responsibility for ensuring the specific implementation of the activities described herein.
8606120176 860512 1
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e ITXAS UTILITIES SERVICES INC.
IN:an.iCTION REVISION ISSUE PAGE DATE CP-EI-4.0-13 9
10-27-83 2 of 6 2.3 RESPONSIBILITY (Continued)
Where specific individuals are designated by title in this instruction, it shall be understood that designees may be delegated to act in that capacity.
3.0 INSTRUCTION 3.1 DESIGN PREPARATION 3.1.1 Cbtain a copy of the current revision of the "BRP" and any outstanding " CMC's".
3.1.2 Cbtain the isometric folder frce the file room custodian. An "Our" card will be inserted into the files with the date with the initials of the responsible engineer.
3.1.3 Check the reference file for data on any valves, instruments or connecting equipnent shown en the iscuetric. If none is available, obtain from DCC.
3.1.4 Refer to the proper document to determine design parameters and criteria to be used in the analysis.
w giate section of specification 2323-MS-46A for 3.1.5 Refer to the e
identification of pipe properties frcm the pipe specification indicated in the line number.
3.1.6 Refer to the piping composite drawing referenced on the "BRP" to determine piping and equipnent located in the vicinity of the line to be analyzed.
3.1.7 Check the pipe routing in the field to verify possible pipe support locations and that piping geometry agrees with BRP's and CMC's.
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itxAS UrILITIES SERVICES INC.
INSTRUCTION REVISION ISSUE PAGE DATE
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10-27-83 3 of 6 3.2 DESIGi 3.2.1 unless specific data is given, seismic displacements at terminating equipment are assmed negligible. Thermal displacements at terminating equipnent nust be calculated if this information is not provided.
3.2.2 Seismic and thermal displacements at interfacing piping shall be reviewed.
l 3.2.3 Nozzle loads on equipnent shall be calculated. Supports shall be located such that these nozzle reaction loads are as low as possible. If the calculated loads exceed the vendor allowables, this shall be documented in the analysis package and in the systen gunch list. Discrepancies will be resolved with the vendor at a later date.
3.2.4 Snall lines emnecting to larger size piping may have been partially included as over lap in the analysis. The following rules govern inclusion in the analysis:
D = 1arger pipe size (run) d= smaller pipe size (brand)
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th d 1,,
o 3 branch is included in the analysis brand is excluded from the analysis D < 6":
1h d 31 D
Y branch is included in the analysis branch is enluded frem the analysis i
If the brand has been included in the analysis of the pipe run, an investigation shall be made to determine support requirements on the bran d piping. Also, outside organizations may have issued support designs for the over lap area and this shall be decked.
l 3.2.5 Generally, interfacing between two isemetrics can be done by over lapping two supports in each direction for both isometrics.
3.2.6 Gang supports shall be used where possible. When this is done, it shall be stated on the caver sheets of all involved analysis packages giving the corresponding support and isometric numbers. All gang support feasibility studies shall be coordinated with the appropriate pipe support deslgn section.
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l TEXAS UTILITIES SERVICES INC.
INSTRUCTI N REVISIm ISSUE PAGE C
DATE CP-EI-4.0-13 9
10-27-83 4 of 6 3.2.7 If rigorous stress analysis is deemed necessary, the conputer analysis service shall be provided by the Site Stress Analysis Group of Gibbs & Hill or computer pipe analysis group of PSE.
3.2. 8 All notations on the Support Iocation Isometric shall be standard as shown below:
N DIRECTICNN SUFFCRT SPRING SNUB 5ER MOO!FIED RIGID ANCHOR 3.2.9 Wherever possible supports shall be nunibered in sequence from one end of the line to the other. Separate support numbers I
shall be given
___ _ at. the same loc.to rigid, snubber, M-Rigid, and spring supports ation and shall be separated dimensionally as
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k 3.2.10 Unless otherwise noted, the field installation tolerance on i
support placement is + 6".
Consequently the seismic and deadweight span should be at least 6" under the allowable. If the support must be located note exactly, place an asterisk (*) beside the
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TEXAS (JIILITIES SERVICES INC.
INSTRUCTION REVISION ISSUE PAGE v
DATE CP-EI-4.0-13 9
10-27-83 5 of 6 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 t
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dimension.
3.2.11 Global axis on support location ismetries shall have the positive i
"X" axis pointing north.
3.2.12 Ioads due to relief valves shall be added to seismic loads by using tb absoluta value.
3.2.13 In the column for " Support No." on Ioad Saunary Sheets the following should be included:
Node point, partial loads, direction and type of support (e.g. X-rigid, Y-snubber, X-Z rigid, etc. )
3.2.14 toads on the load saunary sheet shall be rounded off to the
- k higher whole rAsnber.
(e.g. 49.36 bea:snes 504) 3.2.15 Movements shall be included on the Ioad Sumary Sheets.
3.2.16 For rigorously analyzed piping a note shall be placed on the incunetric which reads "This Iso is a:mputer analyzed".
3.2.17 All assunctions and references used in the analysis shall be documented.
3.3 DESIGN VERIFICATION 3.3.1 All open items shall be 6:xnznanted in the system punch list.
The analysis supervisor shall insure that these punch list items are periodically reviewed and cleared.
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TEXAS UfILITIES SERVICES INC.
INSTRUCTION REVISICH ISSUE PAGE
.l DATE i
10-27-83 6 of 6 1
I 3.3.2 Se pipe stress analysis engineer shall initial and date each j
DIE-5 calculation sheet and all applicable forms in the "CM4" d
Block, nahe a check copy of the analysis pckage and forwrd j
the pckage to the section supervisor.
3.3.3 Se section supervisor shall assign the package to an authorized design wrifier.
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3.3.4 Se design wrifier shall nake his/her aminents en the check copy of the analysis pekage and initial each sheet of the check copy in the "CHKD" block. Se package shall be returned
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to the originating stress analyst for resolution of any comments.
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3.3.5 Upon otspletion of the design wrification, the design verifier I
j shall conglete DHE-22 (and DHE-22A if applicable) initial the j
original of each calculation sheet and all appliable forms in the "CHKD" and "D.V." blocks. Se package shall then be returned to the section supervisor.
j 3.3.6 An authorized engineer shall signify his approval of the analysis pchage by initialing and dating form DHE-14 in the approval j
block.
3.3.7 2e otspleted pckage, which shall include sufficient support j
loading data shall be fonarded to the support design group.
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3.3.8 If remnalysis is required for any reason it shall be performed in the same nenner as described above.
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