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JAN 191973 Docket No. 50-358 The Cincinnati Cas & Electric Company ATTN: Mr. W. II. Dickhont r Vice President P. O. Box 960 Cincinnati, Ohio 45201 Gentlemen:
The enclosed errata sheet for " General Information Required for Consideration cf the Effects of a Piping System Break Outside containment" amends our letter to you dated December 18, 1972. This latter costerned the' potential effects of steam line breaks in the f"
William 'd.@incter Nuclear Power Station.
Please contact us if you lavo any questions regarding the information
. requested y
l Sincerely, I
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John F. Siot John F. Stolz, Chief Boiling Water Reactors Branch 2 firectorateofLicensing Enclocure1 Errata sheet cct Mr. John H. Inskeep. Vice President Coltsabus !and Southern Ohio Electric company 215 North Front Street, Columbus, Ohio' 43215 j Troy B. Conner, Jr.
Esq.
Reid and Priest
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1701 K Street, N. N.
Washington, D. C.
20006 (see next page) 8709240232 870921 PDR FDIA 1
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DISTRIBUTION:
AEC PDR Local PDR-Docket File The Cincinnati Gas &'
2 JAN 191973 RP Reading Electric Company BWR-2 File R. S. Boyd W. Haass
,J. Stolz J' S"811 cc: Mr. William'J. Moran Vice President and General Counsel H. Smith The Cincinnsti Gas & Electric Company P. 0. Box 960 Cincinnati, Ohio 45201 Mr. William G. Porter, Jr.
Porter, Stanley, Traffinger & Platt 37 West Broad Street Columbus, Ohio 43215 Mr. Robert B. Killen, President-The Dayton Power and Light Company P. O. Box 1034.
Dayton, Ohio 45401 Julian de Bruyu Kops, General Counsel The Dayton Power and Light Company P. O. Box 1034 Dayton, Ohio 45401
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ll ERRATA SitEHT FOR "CENERAL INFORMATION REQUIRED F0_R CONSIDERATION OF TilK EFFECTS OF A PTPINC SYSTEM BREAK OUTSIDE _ CONTAINMENT" The following. lists the changes that have' evolved on our initial'information request:
1.
Panc 2. Item 2--Insert the following in 2. to precede the existing.
first sentence:
" Design basis break locations should be selected in accordance with the following pipe whip protection criteria;.however, where pines carrying high energy fluid are routed in the vicinity of structures and
' systems necessary for safe shutdown of the nuclear
-plant, supplemental protection of those structures and systems shall be provided to cope with the r'
environmental effects-(including the effects of jet impingement) of a singic postulated open crack at the most adverso location (s) with regard to those essentini structures and' systems, the length of the crack being chosen not to exceed the critical crack size. The critical crack size is taken to be 1/2 the pipe diameter in length and 1/2 the wall thickness in width."
2.-
Pane 2, item 2(a)(2)--Change nomenclature to read "any intermediate locations between terminal ends where the primary plus secondary stress intensities Sn***
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3.
Page 4, Item 2.(b)(2)--Change 0.9 (Sh+8}E A
(h+ A}*
4.
Page 6, item 7--Add "structhral" to read "The structural design loads..."
5.
Page 7, Item 11 (a)--Add " required" so as to read, " Loss of required
' redundancy..."
6.
Page 7. Item 11.(a)--Deletc "the steam line break" and replace with "that" to read "...the consequences of that accident..."
7.
,P g_,b Item 11._(l )--Replace (b) with the following:
(b) " Environmentally i
,l induced failures caused by n leak or rupture of the pipe which would not of itself result in protective action but does disable protection functions.
In this regard, a loss of redundancy is permitted but a loss of function is not permitted.
For such situations plant shutdown is required."
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Erratn Sheet !%r " General _i_nformat lon _ Required For Considernt lon Of Tiu'
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Effects Of Piping SEstem_ Break Outside Containment" 8
Page_8, item 13--Change wording in the first sentence to read
" Environmental qualification should be demonstrated by test for that electrical equipment required to function in the steam-air environment resulting from a high energy fluid line break."
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