ML19199A384
| ML19199A384 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/31/1973 |
| From: | Schwencer A US ATOMIC ENERGY COMMISSION (AEC) |
| To: | John Miller METROPOLITAN EDISON CO. |
| Shared Package | |
| ML19199A385 | List: |
| References | |
| NUDOCS 7905020006 | |
| Download: ML19199A384 (3) | |
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Fr. Jenn C. :'. iller ECcurccurne Vice President F. O. Ecx 542 Ec~" :, Fe.msylynnia 19603 Centleren:
The encleaed Errata Sheet fcr "Cencral InfcI=ticn Eequir-l for Ccr. sideration cf tr.e iffects of a Piping System e2.:
wreide Ccutnincent" amends cur letters to ycu of Eccetter 15, 1F72. ';~nese letters concen.ed tie retentia.1 effects of ct.d' e ' creaks in tue 5:ree :.ile 121r.d Plant, Units 1 ar.d 2.
Please centact ua if ycu desire am ciscussicn or clcrificaticn of trd.s =ateric1.
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Form AEC-lis Rev 9-33) AECM 0240
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ERRATA S' DEET FOR " GENERAL INFOR'uTION REQUIRED FOR CONSIDERATION OF THE EFFECTS OF A PIPING SYSTEM 3REA'< OUTSIDE CONTAINMENT" The following lists the changes that have evolved on our initial infor=ation request:
1.
Page 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 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 those structures and systems shall be provided to cope with the environ-mental effects (including the effects of jet impingement) of a single postulated open crack at the most adverse location (s) with regard to those essential 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.
Page 2. Item 2(a)(2)--Change nomenclature to read any intermediate locations between terminal ends where the primary plus secondary stress intensities Sn -. "
3.
Page 4, Item 2. (b) (2)--Change 0.9 (Sh*S)t 0.8 (S + S).
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Pace 6, Item 7 --Add " structural" to read "The structural design loads..."
5.
Pace 7, Item ll.(a)--Add " required" so as to read, " Loss of recuired 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 3, Item 11. (b)-- Replace (b) with the following: (b) " Environmentally induced failures caused by a leak or rupture of the pipe 'thich would not of itself result in protective action but does dischle protection functions.
In this regard, a loss of redundancy is permitted but a loss of function is not permitted.
For such situaticas plant shutdown is required."
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Fa2e 8, Item 13--Change wording in the first sentence to read "Inviron= ental qualification should be demonstrated by test for that electrical equip =ent required to function in the steam-air environ =ent resulting from a_ hi2h ener2y fluid line break."
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