ML20032C894
| ML20032C894 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 10/23/1981 |
| From: | Novak T Office of Nuclear Reactor Regulation |
| To: | Groce R Maine Yankee |
| References | |
| NUDOCS 8111120224 | |
| Download: ML20032C894 (2) | |
Text
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OCT 2 31981
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6[gr }.7 Docket No. 50-309 N
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l-OCT Mr. Robert H. Grece Sentar Engineer - Licensing f
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Dear Mr. Croce:
We have reviewed your Ictter dated September 20, 1981 regarding Pressurized Then.ial $ hock te Reactor Pressure Vessels. Your letter indicated that you could respond in a partial or ;1reliminary sense, to the information requested in accordance with the requested schedules, flowever, within a short time following such response you would respond more fully and ycu would prefer the latter approach. You have indicated a schedule oft availability of Informaticn. ranging from October 1, 1931 through April 1, 1982 related to
. reactor vess?1 material properties as detemined from fabrication records and changes in vessel material properties resulting from irradiation effects.
You further state your intention to perfom transient and accident analysis to determine appropriate events for use in vessel integrity evaluations.
You then propose to perform vessel integrity studies using conventional fracture mechanics techniques to demonstrate vessel integrity. We have discussed this with your staff who have indicated that your responses according to your proposed schedule would be in greater detail and more cor.oleta than what we would expect. Therefore, we will accept what you can provide on your proposed schedule and will consider the information in our program.
The safety question related to pressurized thornal shock is being carefully analyzed by the NRC staff. This request is oriented to developing a resolution of this issue by next sumer (19P2). The information which we requested in our August 21, 1981 letter to be submitted within 60 days and 130 days is an important part of the total effort.
If we do not receive all the information WhlCh we requested, We may have less opportunity to avoid the necessity of specifying conservatisms where more definitive and timely information is not available.
Sincerely, Oficinal signed by.
Thomas f4. Novak, Assistant Director h$M1$8@o@gooj@9 for Operating Reacters P
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L Docket No. 50-309 7
fir. Robert H. Groce Senior Engineer - Licensing
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fiaine Yankee Atomic Power Company
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1671 Worcester Road Framingham, Massachusetts 01701
Dear Mr. Groce:
g We have reviewed your letter dated September 20, 1981 regarding Pressurized Themal Shock to Reactor Pressure Yessels. Your letter indicated that you cculd respond in a partial or preliminary sense, to the infomation requested in accordance with the requested schedules. However, within a short time F
following such response you would respond more fully and you would prefer
?.he latter approat.h. You have indicated a schedule of availability of information ranging from October 1,1981 through April 1,1982 related to reactor vessel material properties as detemined from fabrication records and changes in vessel naterial properties resulting from irradiation effects.
You further state your intention to perfom transient and accident analysis to detemine appropriate events for use in vessel integrity evaluations.
You then prorose to perform vessel integrity studies using convent;.iona]N,- hM
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fracture mechanics techniques to deconstrate vessel integrity.#liourner we will accept what you can provide on your proposed schedule and will consider the infomation in our program.
1he safety question related to pressurized thermal shock is being c refully analyzed by the NRC staff. This request is oriented to developing a resolution of this issue by next summer (1982). The infomation which we requested in our August 21, 1981 letter to be submitted within 60 days and 150 days is an important part of the total effort. If we do not receive all the tafomation which we requested, we may have less opportunity to avoid the necessity of specifying conservatisms where more definitive and timely infomation is not available.
Sincerely, Thomas M. Novak, Assistant Director for Operating Reactors 3
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Docket No. 50-309 Mr. Robert H. Groce Senior Engineer - Licensing Maine Yankee Atomic Power Company 1671 Worcester Road Framingham, Massachusetts 01701
Dear Mr. Groce:
We have reviewed your letter dated September 20, 1981 regarding Pressurized Thermal Shock to Reactor Pressure Vessels. Your letter indicated that you could respond in a partial or preliminary sense, to the infomation requested in accordance with the requested schedules. However, within a short time following such respoase you would respond more fully and you would prefer the latter approach. You have indicated a schedule of availability of infomation ranging from October 1,1981 through April 1,1982 related to reactor vessel material properties as determined from fabrication records and changes in vessel material properties resulting from irradiation effects.
You further state your intention to perform transient and accident analysis to detemine appropriate events for use in vessel integrity evaluations.
You then propose to perfom vessel integrity studies using cony g
fracture mechanics tuchniques to demonstrate vessel integrity.*
r we will accept what you can provide on your proposed schedule and will consider the infomation in our program.
The safety question related to pressurized thermal shock is being carefully analyzed by the NRC staff. This regrest is oriented to developing a resolution of this issue by next summer (1982). The information which we requested in our August 21, 1981 letter to be submitted within 60 days and 150 days is an important part of the total effort. If we do not receive all the information which we requested, we may have less opportunity to avoid the necessity of specifying conservatisms where more definitive and timely information is not available.
Sincerely.
Thomas M. Novak, Assistant Director for Operating Reactors Division of Licensing cc: See next page
- See previous page for concurrence
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lir. Robert II. Groce j
Senior Engincor - Licensing
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1671 Worcester Road f
Franinghan, !!assachusetts 01701 j
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Dear !!r. Gmce:
4 We have revicued your letter dated Septemb'r 20, 1981 regarding Pressurized Thernal shock to Reactor Pressure Vessels Your letter indicated that you could respond in a partial or preliminary sense, to the infomation requested in accordance with the requested schedules. !!ouever, within a short time following such response you would resporid more fully and you would prefer the latter approach. You have indicated a schedule of availability of infor-mation ranging fmm October 1,1981 through April 1,1982.
It appears that if you submit the information as it 14 made available you would, for the most part, meet our needs. Therefor (, we would favor this approach. We will accept what you can provide on your proposed schedule and will consider the information in our progran.
j The safety question related to pressurized thermal shock is being carefully analyzed by the NRC staff. This effort is oriented to pmviding recomenda-tions to the Comission for the risolution of this issue by next sunner (1982).
The infomation which we request in our August 21, 1981 letter to be sub-mitted within 60 days and 150 da s is an inportant part of the total effort.
If we do not receive all the in mation which we requested, we may have less opportunity to avoid the necessity of specifying conservatisms where more definitive and timely information is not available.
Sincerely, r
l Thomas it. Novak, Assistant Director
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for Operating Reactors f
Division of Licensing I
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Maine Yankee Atomic Power Company cc:
E. W. Thurlow, President Mrs. L. Patricia Doyle, President SAFE POWER FOR MAINE Maine Yankee Atomic Power Company Post Office Box 774
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Edison Drive Augusta, Maine 04336 Camden, Maine 04843
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Mr. Donald E. Vandenburgh First Selectman of Wiscasset Vice President - Engineering Municipal Building Yankee Atomic Electric Company U. S. Route 1 20 Jurnpike Road Wiscasset, Maine 04578 Wes;tboro, Massachusetts.,01581 n,
Mr. Gustave A. Linenberger John A. Ritsher, Esquire Atomic Safety and Licensing Board Ropes & Gray.
U.S. Nuclear Regulatory Commission 225 Franklin Street Washington, D. C.
20555 Bos. ton, Massachusetts. 02110 - - - -
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David Santee Miller, Esq.
Mr. Rufus E. Brown' 213. Morgan Street,- N. W.
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Deputy Attorney General Washington, D. C.
20001 State of Maine Augusta, Maine 04330 Mr. Paul Swetland
' Resident Inspector / Maine Yankee Mr. Nicholas Barth c/o U.S.N.R.C.
Executive' Director P. O. Box E Sheepscot Valley Conservation.
Wiscasset, Maine 04578.
Association, Inc.
P. O. Box 125 Mr. Charles B. Brinkman Alan, Maine 04535 Manager - Washington Nuclear Operations Combustion Engineering Inc.
Wiscasset Public Library Association 4853 Cordell Avenue, Suite A-1 High Street Bethesda, Maryland 20014 Wiscasset, Maine 04578 Mr. John H. Garrity, Director Mr. Torbet H. Macdonald, Jr.
Nuclear Engineering & Licensing Office of Energy Resources Maine Yankee Atomic Power Company i
State House Station #53 Edison Drive Augusta, Maine 04333 Augusta, Maine 04336 l
Robert M. Lazo, Esq., Chairman Atomic Safety and Licensing Board U.S. Environmental Protection Agency l
U.S. Nuclear Regulatory Commission Region 1 Office Washington, D. C.
20555 ATTN:
EIS COORDINATOR JFK Federal Building i
Dr. Cadet H. Hand, Jr., Director Boston, Massachusetts 02203 Bodega Marine Laboratory l
University of California Bodega Bay, California 94923 i
State Planning Officer
. Executive Department 189 State Street Augusta, Maine 04330 5
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