ML20237K063
| ML20237K063 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 04/10/1987 |
| From: | Williams N CYGNA ENERGY SERVICES |
| To: | CYGNA ENERGY SERVICES |
| References | |
| NUDOCS 8709040176 | |
| Download: ML20237K063 (9) | |
Text
PotL rs Communications
[*!! M 'IA Report 1111111ll1111111!!!111lll11lll Company; CES C Teiecon conference neport Project.
Job No.
Comanche Peak SES 84056 U"
4/10/87 Subject.
Time:
Pipe Stress and Pipe Supports 0 00 a.m.
j Place S W E C Offices, Boston l
Participan.s:
of l
A. C han. S. Scott SWEC W. Evans. T. Lynch (part-tim e)
SWEC S.C. Tu m minelli Cygna Required item Commenta Ac, tion By j
o Support Stiffness - Support RIL 13 (See Telecon 4/3/87) l The TE R A review began with a sam ple of approximately 85 % of i
the 316 steam problems. They reviewed the ISO's and selected l
24 problems for further review. TE R A then reviewed the SW E C l
PSR D calculations for the 24 problems to arrive at the five chosen for the study. The SW E C study is calcu)ation 15454 -
N E(c) - G E N X - 117. Portions of that calculation are attached (6.c heets).
o Fluid Head Analysis - Steam RIL 3 (see Telecon 4/3/87) l l
i There are no Class 1 penetrations. All Class 2 penetrations will be reconciled to ASM E III-N C 3600.
o Rear Backed Sizes - Support RIL 40 S W E C has prepared Calculation 15454 - N Z9(c) - GEN X - 187 that compares dimensions for Grinnell rear brackets to arrive at I
critical dimensions to be used in tha reconciliation.
SWEC issued P M-144 dated April 2,1987 written against C PP-7, Rev. 3 to im plem ent the changes.
j 8709040176 070410 PDR ADOCK 05000445 g
PDR i
Signed.
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Requwed item Comments Action By 1
i o
Design of Seismic /Non-Seismic Interface Anchors Support RIL 28. (See Telecon 4/3/87)
~
1 S W E C is preparing C alculation 15454-N Z(c) - 195 that com pares Hilti Dolt load interaction ratios for combined moment and torque in C PPP-7 procedures.
The com parison is done for trunnion anchors and braced trunnion anchors. The lowest ratio is 0.61 (preliminary value). SW E C intends to reissue a PM that I
i l
will require for the evaluation on allinterface anchors where the interaction ratio using CPPP-7 procedures is graater than 0.60.
]
a Allowable Loads for Hilti Anchors Having Edge Distance Less l
Than SD - Support RIL 42 (see Telecon 4/3/87) l S W E C presented a calculation showing cone overlap for shear l
load between a partial cone at the concrete surface and the cone for the stress field at the tip. The calculation was performed for 3/4 and 1-1/4 inch Hilti with minimum embedment and minimum edge distances, i.e., 3 bolt dianters. Using A CI-349 cone overlap procedures, the calculate J frtion in normal allowable is 22.9% for the 3/4 inch and c O 4 /.,r the 1-1/4 inch Hilti.
In both cases, the CPPP-7 pr,iores gave allowable j
loads below those repudiated by the A CI-349 procedures. The Nelson stud paper by McMackin, Slutter and Fisher (ref. Attach l
G to TX X-6200) indicates that the 5/3 interaction equation is applicable for studs at an edge distance of 3 bolt diameters.
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.3 COMPARISON OF' PIPING ANALYSIS USING GENERIC STIFFNESS WITH PIPING ANALYSIS USING CALCULATED STIFFNESS
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PIPE SUPPORTS WERE REPRESENTED BY GENERIC STIFFNESS PER CPPPJ7, O
CALCULATED STIFFNESS APPROACH PIPE SUPPORTS WERE REPRESENTED BY CALCULATED STIFFNESSES.
0 LOAD CASES SuvPortT Lo^v6 :
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l DISTRIBUTION LIST l
l Mr.
J. Redding Pr. L. Nace Mr. W.
Counsil Mr. J. Muffett Mr.
D.
Pigott l
Ms. A. Vietti-Cook
..Mr; JCi? Grime'sT ' %
MP. I E ISihkin' - S
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Mr. B.
Ramsey Ms. N. Williams Mr. C. Wong l
Mr.
R.
Pascaretta Project File i
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