ML20217K388
| ML20217K388 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 04/27/1998 |
| From: | Wang A NRC (Affiliation Not Assigned) |
| To: | Olivier L BOSTON EDISON CO. |
| References | |
| TAC-MA1307, NUDOCS 9805010190 | |
| Download: ML20217K388 (3) | |
Text
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April 27, 1998 Mr. Leon J. Olivier Vice President - Nuclear / Station Director Boston Edison Company l
Pilgrim Nuclear Power Station RFD #1 Rocky Hill Road Plymouth, MA 02360
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED '
CHANGE TO TECHNICAL SPECIFICATION 3.6.2.1, PILGRIM NUCLEAR POWER STATION (TAC NO. MA1307)
Dear Mr. Olivier:
By letter dated March 25,1998, Boston Edison Company (BECo) proposed a change to the Pilgrim Nuclear Power Plant Technical Specification (TS) 3.6.A.1 - to eliminate a 145" F temperature limit between the reactor vessel flange and adjacent vessel shell. By letter dated i
i April 15,1998 BECo proposed that this amendment request be reviewed under exigent circumstances. The Nuclear Regulatory Commission (NRC) has reviewed the proposed amendment and determined that additionalinformation is needed to complete r.,ur review.
Enclosed is the staff's Request for Additional Information. As BECo has requested this amendment under exigent circumstances please respond as soon as possible Questions regarding this request should be sent to my attention at the above address; or, you l
can contact me at (301) 415-1445.
Sincerely,.
AN
,rhetM ger Project Directorate 1-3 Division of Reactor Projects - t/Il Office of Nuclear Reactor Regulation
' Docket No. 50-293 b
Enclosure:
Request for Additional
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DISTRIBUTION.
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' J. Zwolinski J. Fair DOCUMENT NAME: G:\\PILGRIMWLA1307.RAI To receive a copy of this document, indicate in the box: "C" = Copy without attachment / enclosure "E" = Copy i
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AWang \\WV f3MFried DATE 04/N/98 04/11/98 04t7)g8 OFFICIAL RECORD COPY 9805010190 990427 PDR ADOCK 05000293 P
W Mr. Leon J. Olivier Boston Edison Company Pilgrim Nuclear Power Station cc:
Mr. Ron Lodgett Ms. Nancy Desmond Executive Vice President Manager, Reg. Affairs Dept.
800 Boyleston Street Pilgrim Nuclear Power Station Boston, MA 02199 RFD #1 Rocky Hill Road Plymouth, MA 02360 i
Resident inspector U. S. Nuclear Regulatory Commission Mr. David F. Tarantino Pilgrim Nuclear Power Station Nuclearinformation Manager Post Office Box 867 Pilgrim Nuclear Power Station Plymouth, MA 02360 RFD #1, Rocky Hill Road l
Plymouth, MA 02360 Chairman, Board of Selectmen 11 Lincoln Street Ms. Kathleen M. O'Toole Plymouth, MA 02360 Secretary of Public Safety l
Executive Office of Public Safety Chairman, Duxbury Board of Selectmen One Ashburton Place
. Town Hall Boston, MA 02108 878 Tremont Street i
Duxbury, MA 02332 Mr. Peter LaPorte, Director L
Attn: James Muckerheide Office of the Commissioner Massachusetts Emergency Management Massachusetts Department of Agency Environmental Protection 400 Worcester Road One Winter Street P.O. Box 1496 l
Boston, MA 02108 Framingham, MA 01701-0317 l
l Office of the Attomey General Chairman, Citizens Urging One Ashburton Place Responsible Energy 20th Floor P.O. Box 2621 l
Boston, MA 02108 Duxbury, MA 02331 Mr. Robed M. Hallisey, Director Citizens at Risk l
Radiation Control Program P.O. Box 3803 Massachusetts Department of Plymouth, MA 02361 Public Health 305 South Street W.S. Stowe, Esquire Boston, MA 02130 Boston Edison Company 800 Boyleston St.,36th Floor Regional Administrator, Region i Boston, MA 02199 U. S. Nuclear Regulatory Commission 475 Allendale Road Chairman King of Prussia, PA 19406 Nuclear Matters Committee Town Hall Ms. Jane Fleming 11 Uncoln Street 8 Oceanwood Drive Plymouth, MA 02360 Duxbury, MA 0233 Mr. William D. Meinert Mr. Jeffery Keene Nuclear Engineer Licensing Division Manager Massachusetts Municipal Wholesale Boston Edison Company Electric Company 600 Rocky Hill Road P.O. Box 426 Plymouth, MA 02360-5599 Ludlow, MA 01056-0426
BOSTON EDISON COMPANY REQUEST FOR ADDTIONAL INFORMATION REACTOR VESSEL DELTA T TS CHANGE PILGRIM NUCLEAR POWER STATION J
DOCKET NO. 50-293 1.
DT Calculations - Page 4 of Attachment A to the March 25,1998, submittal, indicates that the flange to adjacent DT is -83' F (corresponding to a stress level of 38 ksi) for cooldown per CENC 1139 and -166 F (corresponding to a stress level of 80 ksi) per M-778. Confirm that they represent results due to the sole effect of the cooldown transient as was suggested in Attachment A. Provide the cooldown rates for both calculations.
Provide also the stress due to the flange bolt load and the stress due to the vessel pressure during cooldown. Assess the impact to the DT's due to these additional stresses.
2.
Heatup Rate Greater than 100' F/hr-Page 3 of Attachment A to the March 25,1998, submittal, indicates that heatup rates of greater than 100" F/hr are assumed to be step temperature changes... Mathematically, what does it mean? Physically, what makes the rate of 100' F/hr the separation point for different analytical treatments for cases with 8
rates larger and smaller than 100 F/hr.
3.
Linear and Mean Body Temperatures - Page 12 of Attachment D to the March 25, 1998, submittal, indicates that the linear and mean body temperatures are needed in the thermal analyses. Refer to the figure on Page 17 and explain the size of these bodies or components for which you have performed the calculations of the linear and body temperatures. Have you derived the linear and mean temperatures separately for the heatup and cooldown transient?
i 4.
Structural Modeling - Page 12 of Attachment D to the March 25,1998, submittal, shows the modeling of the stmeture. Is the model axisymmetric? What am the boundary conditions on both ends of the structure?
Enclosure