ML20154C212
| ML20154C212 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 09/30/1998 |
| From: | Croteau R NRC (Affiliation Not Assigned) |
| To: | Maret G VERMONT YANKEE NUCLEAR POWER CORP. |
| References | |
| 50-271-98-06, 50-271-98-6, TAC-MA2479, NUDOCS 9810060198 | |
| Download: ML20154C212 (3) | |
See also: IR 05000271/1998006
Text
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Mr. Gregory A. M r~t
September 30, 1998
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Dir:ctor of Oper;tions
Vermont Yankee Nuclear Power Corporation
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185 Old Ferry Road
Brattleboro, VT 05301
SUBJECT:
TELEPHONE CONFERENCE TO SUPPORT THE REVIEW OF THE
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ACCEPTABILITY OF EMERGENCY OPERATING PROCEDURES
REGARDING CONTAINMENT RESPONSE TO A DESIGN BASIS ACCIDENT-
VERMONT YANKEE NUCLEAR POWER STATION (TAC NO. MA2479)
Dear Mr. Maret:
As a follow up to Inspection Report 50-271/98-06, dated July 2,1998, we are reviewing the
emergency operating procedures at Vermont Yankee with respect to containment flooding. In
order to complete our review it is necessary to discuss the issues enclosed with the appropriate
members of your staff. I am arranging the date and time for the telephone conference
separately with Mr. Tom Silko of your staff. The purpose of this letter is to provide the enclosed
topics of discussion.
If you should have any questions please contact me at (301) 415-1475.
Sincerely,
Original signed by
Richard P. Croteau, Project Manager
Project Directorate 1-3
Division of Reactor Projects -l/II
Office of Nuclear Reactor Regulation
Docket No. 50-271
Enclosure: Topics for Discussion
cc w/ enclosure: See next page
DISTRIBUTION
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Docket File
C. Cowgill
R. Croteau
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PUBLIC
T. Marsh
T. Clark
Vermont Yankee r/f
R. Palla
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J. Zwolinski
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DOCUMENT NAME: G:\\CROTEAU\\MA2479. CAL
To receive a copy of this document, Indicate in the box: "C" = Copy without attachment / enclosure
"E" = Copy
with tttachment/ enclosure
"N" = No copy
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9810060198 980930
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G. Maret
Vermont Yankee Nuclear Power Station
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Regional Administrator, Region i
U. S. Nuclear Regulatory Commission
475 Allendale Road
Mr. Raymond N. McCandless
King of Prussia, PA 19406
Vermont Division of Occupational
and Radiological Health
Mr. David R. Lewis
Administration Building
Shaw, Pittman, Potts & Trowbridge
Montpelier, VT 05602
1
2300 N Street, N.W.
Washington, DC 20037-1128
Mr. Gautam Sen
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Licensing Manager
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Mr. Richard P. Sedano, Commissioner
Vermont Yankee Nuclear Power
Vermont Depar1 ment of Public Service
Corporation
120 State Street,3rd Floor
185 Old Ferry Road
Montpelier, VT 05602
Brattleboro, VT 05301
Public Service Board
Resident inspector
State of Vermont
Vermont Yankee Nuclear Power Station
120 State Street
U. S. Nuclear Regulatory Commission
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' Montpelier, VT 05602
P.O. Box 176
Vemon, VT 05354
Chairman, Board of Selectmen
Town of Vemon
Mr.' Peter LaPorte, Director
P.O. Box 116
ATTN: James Muckerheide
Vemon, VT 05354-0116
Massachusetts Emergency Management
Agency
Mr. Richard E. McCullough
400 Worcester Rd.
. Operating Experience Coordinator
P.O. Box 1496
Vermont Yankee Nuclear Power Station
Framingham, MA 01701-0317
P.O. Box 157
Govemor Hunt Road
Jonathan M. Block, Esq.
Vemen, VT 05354
Main Street
P. O. Box 566
G Dana Bisbee, Esq.
Putney, VT 05346-0566
Deputy Attomey General
33 Capitol Street
Mr. Michael J. Daley
Concord, NH 03301-6937
Trustee and Legislative Representative
New England Coalition on Nuclear
Chief, Safety Unit
Pollution, Inc.
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- Office of the Attomey General
Box 545
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One Ashburton Place,19th Floor
Brattleboro,VT 05301
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Boston, MA 02108
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Ms. Deborah B. Katz
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Box 83
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Shelbume Falls, MA 01370
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TOPICS FOR DISCUSSION
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1.
Results of licensee's long-term corrective actions committed to in LER 98-10
procedure changes?
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permanent changes to valve positions?
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FSAR amendments forthcoming?
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2.
Description of the flooding / venting-related issues evaluated as part of: (a) EPG Rev 3/4
conversion, and (b) LER follow-up
conflicts between pump alignments / rates and assumptions in NPSH analyses?
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impact of flooding on equipment qualification / survival?
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impact of flooding on containment H2/02 analyzer and PASS sampling
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capabilities?
impact of combined atmospheric and hydrostatic pressure on structures?
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impact of wetwell (WW) venting (and liquid flow) on vent line and valves?
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impact of drywell (DW) venting on vent line, valves, and SGTS operability?
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ability to isolate containment if WW or DW vent line fails?
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impact of secondary building flooding (from WW line failure) on ECCS?
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impact of steam release into secondary building (from DW line failure) on ECCS?
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impact of RPV venting, containment venting, and SGTS failure / bypass on EAB
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and control room doses?
3.
Description of RPV, DW, and WW vent paths and valve alignments: (a) after torus vent
system (TVS) installation, (b) for the interim period (TVS valved out), and (c) for the
long-term.
4.
Description of EOPs and support procedures goveming containment flooding, and
containment and RPV venting for each of the periods identified in (3) above.
5.
Results of VY's assessment of valve operability and pressure capabilities for DW and
WW vent paths under steam and water flow conditions, respectively.
6.
Source term analysis documented in February 22,1991, letter from GE to the BWROG
(referred to in the TIA),
7.
Clarification of what is considered to be the licensing basis radiological doses for a
LOCA - the values in 14.6.3.7 or the values in 14.9.2.1,
Enclosure
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