ML20204F046
| ML20204F046 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, Palo Verde, Indian Point, Saint Lucie, Byron, Diablo Canyon, Callaway, Waterford, San Onofre, Comanche Peak, Rancho Seco, Midland, 05000386, 05000000, 05000273, Atlantic Nuclear Power Plant, Crane |
| Issue date: | 04/12/1983 |
| From: | Eisenhut D Office of Nuclear Reactor Regulation |
| To: | Palladino N NRC COMMISSION (OCM) |
| Shared Package | |
| ML20204E909 | List: |
| References | |
| FOIA-88-99, TASK-AS, TASK-BN83-042, TASK-BN83-42 BN-83-042, BN-83-42, NUDOCS 8304220651 | |
| Download: ML20204F046 (20) | |
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a April 12. 1983 s
Docket teos. 50-528/529/530 Doctament Control Desk:
50-239. 50-361/362 50-454/455. 50-483. 50-145/446, 50-437, 50-389. 50-370 50-275/323. 50-247/386 50-275/323, 50-483 50-329/330. 50 529/530-50-312, 50- %)/362. 50-289.
50-382 HEMORANCUi FOR:
Chainsan Palladino Cossaissioner Gilinsky Comissioner Ahearne Cossaiss1oner Roberts Ccneissioner Asselstine FR0ft:
Darrell G. Eisenhut. 01 rector Olvision of Licensing Office of Nuclear Reactor Regulation
SUBJECT:
U'tANALYZE0 REACTOR VESSEL THERHAL STRESS 00 RING C0Ct00WN (Board Notification i BM-83-42)
The enclosed infomation is being provided in accordance with present NRC procedures for Board Hotification.
This information is -
'ble to all pressurized water reactors.
19bcock and Wilcox has informed the staff of a preltainary safety concern which has evolved from further consideration of the 6/10/80 St. Lucie upper head voiding event.
It appears that thermal ttresses, beyond those con-sidered in the ortgtnal design, may develop in the reactor vessel flange.
and studs because of large axiahtemperature gradients across the reactor vessel flanges.
This may result in thermal stresses which exceeil code allowables.
The staff considers this a potential generic safety issue and is currently in the process of assessing its safety significance.
If it is deterutned that the safety significance is sufflctent to warrant resolution. a schedule will be established.
The staff will inform the Soards when a dectston is nade regarding tne resolution of this issue, ns, a stene4 W.
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cc: SECY April 12. 1983 OGC EDO OPE A_SL,B_a,nd _ Parties to._the Pr_oceyihs,,f_or:
S Byron Units 1 & 2 (Smith. Callihan. Cole) (50-454/455)
Callaway. Units 1 & 2 (Gleason Bright. Kline) (50-483/486)
Hldland. Units 1 & 2 (Eechboefer Cowan. Harbour) (50-329/330)
(50-382)
Waterford Unit 3 (Wolfe, forman, Jordan) ley. Hand, Johnson) (50-361/362)
San Onofre Nuclear Powr Units 2 ' 3 (Kel Rancho beco (Cole. Shon) (50 312)
Indlari Point (Gleason, Paris. Shon) (50'-247/286)
Comanche Peak Units 1 & 2 (Miller, Jordan. McCollom) (50-445/446)
Palo Verde 2 & 3 (Lazo Callihan. Cole) (W529, 50-530)
ASLAB and Parties to the Proceedings, for_:
Callaway. Units 1 & 2 (Rosenthal. Edles. Gotchy) (50-483/486)
Waterford Unit 3 (E11perin. Johnson, Kohl) (5J-275/323) 50-382)
Ulablo Canyon 1 & 2 (Hoore Johnson Buck) L San Onofre 2 & 3 (E11perin, Gotchyl Johnsoni (50 361/362)
THI-I ([dles. Buck, Gotchy, Kohl) (W289) )
Rancho Sec.o (Roseithal. Buck, Kohl (50-312 6l ir=.ee pl
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