ML20011F136
| ML20011F136 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 02/22/1990 |
| From: | Vissing G Office of Nuclear Reactor Regulation |
| To: | Mroczka E CONNECTICUT YANKEE ATOMIC POWER CO. |
| References | |
| GL-88-11, TAC-71515, NUDOCS 9003010242 | |
| Download: ML20011F136 (3) | |
Text
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-,e1 February 22, 1990 e
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!'< b' I-Docket No. 50 336 l
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Mr. Edward J. Mroczka Senior Vice President Nuclear Engineering and Operations-
, Connecticut Yankee Atomic Power Company.
? Northeast Nuclear Energy. Company P. O. Box 270-Hartford, Connecticut 06141-0270
Dear Mr. Mroczka:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION-. RESPONSE TO GENERIC LETTER 88 11, RADIATION EMBRITTLEMENT OF REACTOR VESSEL MATERIALS -
MILLSTONE 2(TAC.71515)
We have_ reviewed your response of November 1,1988 to Generic Letter 88-11, Radiation Embrittlement of Reactor Vessel Materials, for Millstone 2 and have determined that we need additional information. The enclosed Request For Additional Information identifies the needed information. We request your response within 45 days from receipt of this letter.
'The reporting and/or recordkeeping requirements of this letter affect fewer than 10 respondents; therefore OMB clearance is not required under P.L.
96 511.
Sincerely,
/s/
Guy S. Vissing,' Project Manager Project Directorate 1-4 Division.of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
See next page
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UttICIAL KtLUKU LUFY Document Name: TAC 71515 9003010242 900222 h
PDR ADOCK 05000336 p"
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Mr.. Edward J. tireczka' Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit No. 2 cc:
E Gerald Garfield, Esquire R. M. Kacich, Manager Day, Berry and Howard Generation Facilities Licensing Counselors at Law Northeast Utilities Service Company C1ty. Place.
Post Office Box 270 Hartf ord, Connecticut. 06103-3499 Hartford, Connecticut 06141-0270 i
W. D. Romberg, Vice President D. O. Nordquist Nuclear Operations Director of Quality Services Northeast Utilities Service Company Northeast Utilities Service Company Post Office Box 270 Post Office Box 270
-Hartford, Connecticut 06141-0270 Hartford, Connecticut 06141-0270 Kevin McCarthy, Director Regional Administrator Radiation Control Unit Region I Department of Environmental Protection U. S. Nuclear Regulatory Commission State Office Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 E
Bradford S. Chase, Under Secretary First Selectmen Energy Division Town of Waterford Offico of: Policy and lianagement Hall of Records 80 Pashington Street 200 Boston Post Road Hartford. Connecticut. 06106 Waterford, Connecticut 06385 S. E. Scace,E Nuclear Station Director W. J. Raymond, Resident Inspector i
tiillstene Nuclear Power Station Millstone Nuclear Power Station Northeast Nuclear Energy Company c/o U. S. Nuclear Regulatory Comission Post Office Box 128 Post Office Box 811-i Waterford, Connecticut 06385 Niantic, Connecticut 06357 J. S. Keenan, Nuclear' Unit Director Charles Brir.kman, Manager Millstone Unit No. 2 Washington Nuclear Operations Northeast Nuclear Energy Company C-E Power Systems Post-Office Box 128 Combustion Engineering, Inc.
Waterford. Connecticut 06385 12300 Twinbrook Pkwy Suite 330 Rockville, Maryland 20852 k
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, REQUEST FOR' ADDITIONAL-INFORMATION
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CONCERNING RESPONSE TO GENERIC LETTER 88-11 MILLSTONE NUCLEAR POWER STATION 'JNIT NO. 2-NORTHEAST NUCLEAR ENERGY COMPANY.
DOCKET NO.-50-336 1.
We need the copper and nickel content for the beltline welds.
2.
.End.of. life.(FDL). fluence D.-C. Switzer's letter to G. Lear (12/9/77) indicates that 7
the E0L fluent.e is 1.9E19 n/cm sq. The Combustion Engineering document TR-N-t!Cff-008 (April 1982), " Evaluation of Irradiated Capsule W-97," states'that the E0L fluence is 2.96E19 n/cm sq.
(TableV-7,p.37). Which is correct?
3.
Upper Shelf. Energy (USE).for. plate.C-5667-1.(surveillance plate D. C. Switzer's letter to G. Lear (12/9/77) indicates that USE for the subject plate is 72.8 ft-lb in Table 2.4 and 106.5 in Table 3.1.
The RT is = 10 degrees F in Table 2.4 and
-10degreeFinTableSIl. The Combustion Engineering document N
TR-N-MCM-008 (April 1982), " Evaluation of Irradiation Capsule W-97," states that USE is 108.6 ft-lb. The FSAR (Table 4.6-1 states that USE is 112 ft-lb.
Which is correct?
l If the measured USE values are so variable for one plate, does this apply to the other plates as well?
4.
The latest.P/T curves.
l The P/T curves in the FSAR (Figure 4.5-4) are from a June 10, 1982 submittal. They are applicable for 2 to 10 years and are nonconservative. The P/T curves in FSAR Figures 4.5-4 are applicable for 10 to 40 years and are conservative for an E0L ll fluence of 1.9E19 and 2.96E19 n/cm sq. Which Figure are you L
using now? At what EFPY is Millstone 2?
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