ML20127P105
| ML20127P105 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 11/20/1992 |
| From: | Vissing G Office of Nuclear Reactor Regulation |
| To: | Opeka J CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO. |
| Shared Package | |
| ML20127P109 | List: |
| References | |
| REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR GL-87-02, GL-87-2, TAC-M69459, NUDOCS 9212020067 | |
| Download: ML20127P105 (4) | |
Text
_ _ _ -
)
[& **%g*
h UNITED STATES 1'
'(
NUCLEAR REGULATORY COMMISSION
((
{
W ASHING TON, D. C. 20565
(
l 8
November 20, 1992 j
Docket No. 50-336 Mr. John F. Opeka Executive Vice President, Nuclear Connecticut Yankee r omic Power Com"ny Northeast Nuclear Energy company Post Office Box 270 Hartford, Connecticut 06141-0270
Dear Mr. Opeka:
~
SUBJECT:
EVALUATION OF MILLSTONE NUCLEAR POWER PLANT, UNIT N0.2 120 DAY RL5FGiM TO SUPPLEMENT NO.1 TO GENERIC LETTER 87-02 (TAC NO. M69459)
Enclosed is the staff's evaluation of the Northeast Nuclear Energy Company's (NNECO's), response to Supplement No. I to Ceneric Letter (GL) 87-02 for the Millstone Nuclear Power Station, Unit 2, which was submitted to the staff in a letter dated September 21, 1992.
Supplement No. I to GL 87-02 required that all addressees provide, within 120 days of the issue date of the supplement, either a commitment to use both the Seismic Qualification Ut lity Group 'SQUG) commitments and the implementation guidance described in the Generic Inflementatior N ocedure Revision 2 (GIP-2). x curracted on r bruary 14, 1992, and as ;upplemerted by the staff's e
Supplemer.tal Safety Evaluation Report No. 2 (SSER No. 2) on GIP-2, or else provide an alttrnative method for responding to GL 87-02.
The supplement also reqc red that taose addressees committing to implement GIP-2 provide an implementation chedule, and provide the detailed information as to what procedures and ;riteria were used to generate the in-structure response spectra to be used for USI A-46.
In addition, the staff requested in SSER No.
2 that the licensees in'orm the staff in the 120-daj response if they intend to change their licensing basis tc reflect a commitment to the USI A-46 (GIP-2) methodology for verifying the seismic adequacy of mechanical and electrical equipment, prior to receipt of the staff's plant-specific safety evaluation resolving US. A-46.
The staff fino:. ihat NNECO's commitment to implement GIP-2, including the clarifications, interpretations and exceptions identified in SSER No. 2, is an acceptable method for resolving USI A-46 at the Millstone Nuclear Power Station, Units 2.
The staff finds that it is acceptable for the licensee to i
use previously performed anchorage evaluations for USI A-46 provided that the evaluations meet the criteria and procedures approved in SSER No. 2 (Section 11.4.4).
The staff also finds that it is acceptable to use existing seismit qualification test reprcts to demonstrate operability for SSEL equipment which was qualified to IEEE 344-1975. The methods defined in EPRI Report NP-6041-SL art, in general, not acceptable to the staff for resolving equipment outliers.
However, the staff will consiinr the application of some of the criteria provided in EPRI Report NP-604. -SL, for the resolution of equipment outliers, 3
9212020067 921120 PDR ADOCK 05000334-Quo &, 2; L
,1; a li j
(
g 90\\
l 1
'Mr. John F. Opeka ;
on a case-by-case basis.
The proposed implementation schedule for-Millstone Unit 2 is within the 3-year response period requested by the staff and is therefore acceptable.
itNECO's in-structure response spectra as submitted in the letter dated September 21, 1992, was reviewed against the staff positions delineated in SSER tio. 2 and determined to be adequate and acceptable.
This conclusion-is based on the assumption that the statements made in the submittal, including the criteria and procedure used in the generation of the in-structure response spectra, correctly reflect what is contained in the FSAR on seismic design and other licensing basis. The staff may audit the process by which the in-structure response spectra were generated.
NilECO indicated that, as part of the resolution of GL 87-02, it intends to change its licensing basis, via 10 CFR 50.59, to include the GIP methodologies as an option for demonstrating the seismic adequacy of new and replacement plant equipment. The staff recognizes that NNECO may revise their licensing basis in accordance with 10 CFP 50.59 to reflect the acceptability of the USI 6
A-46 (GIP) methodology for verifying the seismic adequacy of electrical and mechanical equipment covered by the GIP. However, since NNECO intends to augment its licensing basis to include the GlP methodology as an option for verifying seismic adequacy rather than revise its licensing basis such that the GIP-2 would be the sole methodology, the staff cautions that it is not acceptable to combine any part of GIP-2 with the current licensing basis methodologies such that it results in a less conservative approach than if GIP-2 or the current licensing basis methodologies were applied separately.
if you have any questions concerning this review, please contact me.
Sincerely, Original signed by Guy S. Vissing, Senior Project Manager Project Directorate 1-4 Division of Reactor Projects 1-4 Office of Nuclear Reactor Regulation Enclc ure:
As stated cc w/ enclosures See next page
- See previouseconcurrence onitt LA:PDI-4.
PM:PDI-4 EMEB*
D:P0hh
$NAr'r~1 s GSVf n
JNorberg JStolb hAME
\\\\/h/92
// /2 "/92 11/19/92 l M /9'2
/ /
/
OFFICIAL RECORD C'JPY Document Name:
G:\\VISSING\\M69459
4 g
.1 A
r-
' DJ st'ribu'cion:
Docket file NRC & Local PORs PD I-4 Plant.
SVarga JCalvo SNorris GSVissing OGC PChen CPTan MMcBrearty ACRS (10)
LTDoerflein, RI A.
D 4
l l:
f :.
I i
t i
l-l.
+
, r c -
3 s.
4.,
~.
C i
Mr. John F. Opeka Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit 2 cc:
Gerald Garfield, Esquire R. M. Kacich, Director Day, Berry and Howard Nuclear Licensing Counselors at Law Northeast Utilities Service Company City Place Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 W. D. Romberg, Vice President D. O. Nordquist 1
Nuclear, Operations Services 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 C6106 King of Prussia, Pennsylvania 19406 Allan Johanson, Assistant Director First Selectmen Office of Policy and Development Town of Waterford Policy Development & Planning Division Hall of Records 80 Washington Street 200 Boston Post Road Hartford, Connecticut 06106 Waterford, Connecticut 06385 S. E. Scace, Nuclear Station Director P. D. Swetiand, Resident Inspector Millstone Nuclear Power Station Millstone Nuclear Power Station Northeast Nuclear Energy Company c/o U.S. Nuclear Regulatory Commission.
Post Office Box 128 Post Office Box 513-Waterford, Connecticut 06385 Niantic, Connecticut 06357 J. S. Keenan, Nuclear Unit Director Charles Brinkman, Manager Millstone Unit No. 2 Washington Nuclear Operations Northeast Nuclear Energy Company ABB Combustion Enginee ms Post Office Box 128 Nuclear Power Waterford, Connecticut-06385 12300 Twinbrook Pkwy, Suite 330 Rockville, Maryland 20852 Nicholas S. Reynolds Winston & Strawn 1400 L Street, NW Washington, DC 20005-3502 a