ML19326B918
| ML19326B918 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 01/22/1973 |
| From: | Schwencer A US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Phillips J ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 8004180638 | |
| Download: ML19326B918 (3) | |
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- gggggy, hanauer EGoulbourne(2) 9 j Docket No. 50-313 RCDeYoung DSKovholt JAN 2 21973 FSchroeder RRMaccary DKnuth RTedesco HDenton Mr. J. D. Phillips Vice President & Chief Engineer Arkansas Power & Light Company Sixth and Pine Streets Pine Bluff. Arkansas 71601 i
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Dear Mr. Phillips:
On December 14,1972 Mr. A. Giastmsso transmitted to you a request for analyses and inforestion related to the rupture of high energy lines outside containment. An enclosure to that letter defined the general information required. We have since identified a number of clarificatiostand correcticas to that enclosure and enclose them herewith. Your staff has already been infonned of these items by telephone.
j sincerely, l
ge.1 steneN Albert SchwM#
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A. Schwencer, Chief j
Pressurized Water Reactors Branch No. 4 Directorate of Licensing
Enclosure:
Errata Sheet cc w/ enc 1:
Horace Jame11. Esquire House. Holms & Jewell 1550 Tower Building Little Rock, Arkansas 72201 0[h 800418
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ERRATA SHEET FOR " GENERAL INFORMATION REQUIRED FOR CONSIDERATION OF THE ETEECTS OF A PIPING SYSTDi BREAK OUTSIDE CONTAINMENT" The following lists the changes that have evolved on our initial information request:
1.
Page 2, Item 2--Insert the following in 2. to precede the existing first sentence:
" Design basis break locatione should be selected in accordance with the following pipe whip protection criteria; however, where pipes carrying high energy fluid are routed in the vicinity of structures and systems necessary for safe shutdown of the nuclear plant, supplemental protection of thosa structures and systems shall be provided to cope with the environ-1 mental effects (including the effects of jet impingement) of a single postulated open crack at the m--
-dwerse location (s) with regard to those i
esar
_actures and systems, the length of the
- cra, eing chosen not to exceed the critical crack i
size. The critical crack size is taken to be 1/2 i
the pipe diameter in length and 1/2 the wall thickness in width."
2.
Page 2, Item 2(a)(2)--Change nomenclature to read "any intermediate locations between terminal ends where the primary plus secondary stress intensities Sjn... "
3.
Page 4, Item 2. (b)(2)--Change 0.9 (Sh*8)t 0.8 (S
+S).
A 4.
Page 6, Item 7 --Add " structural" to read "The structural design loada..."
5.
Page 7, Item 11. (a)--Add " required" so as to read, " Loss of required redundancy..."
6.
.Page 7, Item 11.(a)--Delete "the steam line break" and replace with "that" to read "...the consequences of that accident..."
7.
Page 8, Item 11. (b)-- Replace (b) with the following: (b) " Environmentally induced failures caused by a 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."
2-
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8.
Pase 8. Item 13--Change wording in the first sentence to read
" Environmental qualification should be demnstrated by test for that electrical equipment required to function in the steam-sir environment resulting from a hiah energy fluid line break."
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