ML17341B644
| ML17341B644 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon, Humboldt Bay, 05000000 |
| Issue date: | 02/23/1982 |
| From: | Cloud R ROBERT L. CLOUD ASSOCIATES, INC. |
| To: | Miraglia F Office of Nuclear Reactor Regulation |
| References | |
| P-105-4, NUDOCS 8202250171 | |
| Download: ML17341B644 (6) | |
Text
ACCELERATED DISTRIBUTION DEMONSTPWTION SYSTEM REGULAT(O INFORMATION DISTRIBUTIONOISTEM (RIDE) f ACCESSION /BR:9202250171 DOC.DATE: 92/02/13 NOTARIZED:
NO DOCKET g
FACIL:50"-250 Turkey Point Plant, Unit 3, Florida Power and Light C 05000250 50-251 Turkey Point Plant, Unit 4, Florida Power and Light C
05000251 AUTH.NAME AUTHOR AFFILIATION PLUNKETT,T.F.
Florida Power a Light Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Forwards updated estimate of RT PTS
& beltline matls data, per NRC 910515 issuance of rev to 10CFR50.61(b)(l) requirements. Updated estimate demostrates adequate margins of safety to screening criterion for circumferential welds.
DISTRIBUTION CODE:
A049D COPIES RECEIVED:LTR / ENCL /
SIZE:
TITLE: OR Submittal:
Thermal Shock to Reactor Vessel NOTES:
RECIPIENT ID CODE/NAME PD2-2 LA AULUCKFR COPIES LTTR ENCL 1
0 2
2 RECIPIENT ID CODE/NAME PD2-2 PD COPIES LTTR ENCL 1
1 INTERNAL: AEOD/DOA NRR/DST SE2 NRR/DST/SRXB SE OGC/HDS3 RES DE RES/DSIR/EIB RES/DSR/RPSB EXTERNAL: NRC PDR 1
1 1
0 1
0 1
0 1
1 1
1 1
1 1
1 NRR/DET 8H3 NRR/DST/SPLB SD REG FIL 01 RES DE/MEB/MES RES/DSIR/RPSIB RGN1 ADMSTR NSIC 1
0 1
1 1
0 1
1 1
1 1
1 1
1 1
1 NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTEl CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LIKES FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 20 ENCL 14
.0. Box 029100, Miami, FL, 33102-9100
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L-92-27 FEB 18 1992 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.
C.
20555 Gentlemen:
Re:
Turkey Point Units 3 and 4
Docket Nos.
50-250 and 50-251 10 CFR 50.61 b
1 Re ort By letter L-86-09 dated January 23, 1986, Florida Power and Light Company (FPL) submitted the projected values for Reference Transition Temperature, Pressurized Thermal Shock (RT,) for Turkey Point Units 3
and 4, in accordance with the requirements of 10 CFR 50.61 (b)(1).
On May 15,
- 1991, the NRC issued a revision to 10 CFR 50.61.
In accordance with the revised 10 CFR 50.61 (b)(1),
an updated estimate of the RT, for Turkey Point Units 3 and 4 is provided in Table 1; Table 2 provides the beltline materials data for Turkey Point Units 3
and 4.
The critical beltline materials, initial properties, chemistry data of the critical beltline materials, and the limiting circumferential weld (SA 1101) specified in L-86-09 remain unchanged.
The fluence reduction program, implemented by FPL and verified by the NRC per NRC letter dated February 27,
- 1985, remains unchanged.
The fluence reduction program consists of low-leakage fuel loading patterns coupled with part-length burnable absorbers, located so as to reduce the neutron flux to the pressure vessel circumferential weld from high importance core locations.
The RT, calculations were performed using equation 1 of 10 CFR 50.61 (b) (2).
An M value of 34 was used for forgings and an M value of 56 was used for welds.
Initial properties based on drop weight and Charpy tests were used for both forgings and welds.
The updated estimate of the RT, for Turkey Points Units 3 and 4
provided in Table 1 demonstrates adequate margins of safety to the screening criterion for circumferential welds of 300'F, as specified in 10 CFR 50.61.
Should there be any questions, please contact us
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O!AM PlAIA wOQ AIO OO AIIA O'0
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Al Al OQ.'IR O'Q.Q.
Very truly yours, T.
F
~ Plunkett Vice President Turkey Point Nuclear TFP/OIH Attachments cc:
Stewart D. Ebneter, Regional Administrator, Region II, USNRC Senior Resident Inspector,
- USNRC, Turkey Point Plant an FPI. Group company P(19j t 0
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TABLE 1 CURRENT AND PROJECTED RT TURKEY POINT UNIT 3 Date August 24i 1992 April 27, 2007 July 19, 2012 Fluence (x 10
)
neutrons/cm~
(E > 1.0 MeV) 1.501 2.342 2.641 Intermediate Shell
('F) 115 120 121 Lower Shell
('F) 121 127 128 Girth Weld ('F) 287 293 TURKEY POINT UNIT 4 Date October 15, 1991 April 27, 2007 April 10, 2013 Fluence (x 10
)
neutrons/cm'E
> 1.0 Mev) 1.366 2.210 2.533 Intermediate Shell
('F) 121 125 126 Lower Shell
('F) 112 117 118 Girth Weld ('F) 262 285 291
TABLE 2 MATERIALS DATA FOR TURKEY POINT UNITS 3 AND 4 BELTLINE MATERIALS UNIT LOCATION Intermediate shell Lower shell Intermediate to lower girth weld Intermediate shell Lower shell Intermediate to lower girth weld HEAT NO.
123 P 461 VA-1 123 S 266 VA-1 71249 123 P 481 VA-1 122 S 180 VA-1 71249 LOT NO.
N/A N/A 8445 N/A N/A 8445 SCu 0.058 0.079 0.26 0.054 0.056 0.26
%Ni 0.70 0.68 0 '0 0.71 0.70*
0.60 INITIAL RTHDT ('F) 40 30 10 50 40 10 Changed from 0.71%; typographical error on the January 23, 1986 submittal.
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