TXX-6878, Interim Deficiency Rept CP-87-44 Re Spec CPES-1-1018 Which Allows Use of Either ASTM A-307,Grade a or B or SAE J-429, Grade 1 or 2 Bolting in Tubing Supports.Initially Reported on 870717.Evaluation Continuing.Next Rept by 880107
| ML20236C481 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/23/1987 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-44, TXX-6878, NUDOCS 8710270215 | |
| Download: ML20236C481 (1) | |
Text
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F Log # TXX-6878 l
Fi1e # 10110 l-
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903.9 M/ ELECTRIC Ref.# 10CFR50.55(e)
I l
, William G. Counsil l
emota, vic, riesisen, October 23, 1987 i
U. S. Nuclear Regulatory Commission 1
l Attn: Document Control-Desk g
Washington,- D. C.
20555 s
8C$
SUBJECT:
COMANCHE PEAK. STEAM ELECTRIC STATION (CPSES)
_ 1 :7 DOCKET NOS. 50-445 AND.50-446 o
UNISTRUT-TUBING' SUPPORT BOLTING
/
SDAR: CP-87-44 (INTERIM REPORT)
->g Gentlemen:
w On July 17, 1987, we verbally notified your Mr. Ian Barnes of a deficiency involving Specification CPES-1-1018 (Installation of Piping / Tubing and Instrumentation) which allows the use of either ASTM A-307, Grade A or B or SAE J-429, Grade 1 or 2 bolting in tubing supports. This is an interim report of a potentially reportable item under the provisions of 10CFR50.55(e). Our latest interim report was logged TXX-6644, dated August 17, 1987, i
-The majority of safety-related tubing supports are fabricated utilizing 1
-(ypical Unistrut members and joint configurations.Unistrut Catalog 10R 1
.t dated 1986) requires the use of SAE J-429 Grade 2 bolts.
The torquing requirements specified by Unistrut for SAE J-429, Grade 2 bolts results in a tensile stress which could cause " permanent set" if ASTM A-307, Grade A or B bolts are used'instead of SAE J-429, Grade 2.
These conditions could result-in unpredictable bolting clamping forces and unknown load limits.
Our evaluation of this condition is continuing. Our next report on this issue will be submitted no later than January 7, 1988, i
Very truly yours, 8710270215 871023
- C W. G. Counsil DAR/gj c - Mr. R. D. Martin, Region IV Resident In',pectors, CPSES (3) dl P ib