ML19249B977
| ML19249B977 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 08/22/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Koester G KANSAS GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7909070170 | |
| Download: ML19249B977 (1) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION 2
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REGION IV S %' N # '/
611 RYAN PLAZA DRIVE, SUITE 1000 g
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August 22, 1979 In Reply Refer To:
RIV Docket No. STN 50-482/IE Bulletin No. 79-02 Rev. 1, Supplement 1 Kansas Gas & Electric Co.
Attn:
Mr. Glenn L. Koester Vice President-Operations Post Office Box 208 Wichita, Kansas 67201 Gentlemen:
Enclosed is IE Bulletin No. 79-02, Revision 1, Supplement No. 1,t:hich is
.orwarded to you for information. No written response is required. If you desire additional information regarding this natter, please contact this of fice.
Sincerely,
\\l ' \\ p em-cm Karl V. Seyfrit Director
Enclosures:
1.
- Revision No. 1 0
0 (Supplement No. 1)
", f }j 2.
List of IE Bulletins Issued
_9 in Last Six Months D
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_.a cc: w/ enclosures Messrs. Nicholas A. Petrick, SNUPP3 D. T. McPhee, Kansas City Power and Light Company Gerald Charnof f, Shaw, Pittman, Potts 6 Trowbridge E. W. Creel, Kansas Cas and Electric Company 7909070 O
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF IN3PECTION AND ENTORCEi!ENT WASHINGTON, D.C.
20555 IE Bulletin No. 79-02 Revision No. 1 (Supplement No. 1)
Date: August 20, 1979 Page 1 of 2 PIPE STPFCRT EASE PLATE DESIGNS USING CONCRETE EXPANSION ANCHOR BOLTS Descript:ca of Circunstances:
The su; lement to IE Bulletin No. 79-02 is intended to establish criteria for the evaluation of interim acceptability of plant operation with less than the design factor s of safety for piping supports due to as-built problems, under design, base plate flexibility, or anchor bolt deficiencies.
In the reviews for system operability of the Duane Arnold and Crystal River facilities, criteria have been developed by the NRC staff that defines pipe support operability. The criteria has been applied in lieu of other analysis or evaluation.
Specifically, the licensees identified problems with pipe supports in which the original design factors of safety were not met but some lesser cargin was available. The design margins of fcur or five are intended to be final design and installation objectives, but systems may be classed as operable on an interim basis with some lesser margin, providing a program of restoration to at least the Bulletin factors of safety has been developed.
Facilities which fall outside the operability criteria are considered to probably require a Technical Specification exception and will require review on a case-by-case basis.
Action to be Taken by Licensees:
For the following two cases, plant operation may co.tinue or may begin:
a.
For the support as a unit, the factor of safety compared to ulti-mate strengths is less than the original design but equal to or greater than two.
b.
For the anchor bolts the factor of safety is equal to or greater than two and for the support steel the original design factor of safety com-pared to ultimate strengths is met.
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f; graded to design margins of safety exped DUPLICATE DOCUMENT and by the next refueling for nonaccessi fined in Bulletin No. 79-14 where " norma $ Entire document pueviously entered of the plant which can be entered during ainto system under:
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