ML20216C957
| ML20216C957 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 04/09/1998 |
| From: | Andersen J NRC (Affiliation Not Assigned) |
| To: | Bowling M NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| TAC-MA1283, NUDOCS 9804150117 | |
| Download: ML20216C957 (5) | |
Text
. Mr. Martin L. Bowimg, Jr.
Recovery Officer-Millstone
- Unit Ns. 2
- Northeast Nuclear Energy Company clo Ms. Patricia A~ Loftus
' Director-Regulatory Affairs P. O. Box 128 -
Waterford, CT 06385
SUBJECT:
MILLSTONE NUCLEAR POWER STATION, UNIT NO. 3 - CHANGE TO TECHNICAL SPECIFICATION BASES SECTION 3/4.5.2 (TAC NO. MA1283)
Dear Mr. Bowling:
By letter acted March 17,1998, Northeast Nuclear Energy Company (the licensee) submitted a change to Tedmical Specification (TS) Bases Section 3/4.5.2, "ECCS [ emergency core cooling L I
system] Subsystems." The change addresses the method used to verify that the water filled :
- portion of the recirculation spray system (RSS) is full of water.
In its March 17,1998, letter, the licensee, stated that the TS require monthly surveillance -
verification that specified sections of emergency core cooling system piping are full of water. TS Bases Section 3/4.5.2 currently indicates'" venting" as the method to be used.. In its letter, the.
licensee stated that the design of the RSS thermal expansion loop piping was changed from normally laid-up-dry to normally_ filled with borated water.; The licensee further stated that '
ultrasonic testing (UT) will be used each month as the extemal water level detection method to detect for a ventable gas quantity in the horizontal runs and to reverify liquid level in the 7 foot thermal expansion loop risers. The use of a non-intrusive method (UT) is necessary as venting of the RSS thermal expansion loop piping would be a breach of the containment pressure boundary.
The Millstone Unit 3 Plant Operating Review Committee approved the revision to Bases Section -
~
i 3/4.5.2 on March 13,1998. The NRC staff has reviewed the change and has no objection to the wording. A copy of revised TS Bases page B 3/4 5-2 is enclosed.
' Sincerely, a
Original signed by:
-James WJ Andersen, Project Manager Special Projects Office - Licensing n
Office of Nuclear Reactor Regulation -
- Q$'
Docket No. 50-423 j
. gn.i a
j5
Enclosure:
Revised TS Bases page B 3/4 5-2
/
L 5:o
/
cc w/ encl: See next page y
mv DISTRIBUTION:
PMcKee
$8 M
LBerry -
/
PUBLIC '
JAndersen SPO-L Reading OGC i
E SPO Reading ACRS l
"A jUQp A p= pgg WTravers GHill(2) l eWJ ii G heda My 7[j PMcKee WBeckner, TSB LBorry-
/#idu,I JDurr R
-Ri JAndersen DOCUMENT NAME: G:\\ANDERSEN\\a1283.wpd To receive a copy of this document, indicate in the box: "C" = Copy without attachment / enclosure "E" = Copy with ett6ichment/ enclosure "N" = No copy 4#
OFFICE SPO-L:PM d
SPO-L:LR SRXB
//
APO-L:DR m E/A C.S l
NAME JAndersen#4 LBerry W
~ C.1)i d MpicKeeV4M1)
C4 DATE-d$f f /98 '
034)98 d f '^^ 4 lot /O M98 ; ~
0%T/96)
~ -
OFFICIAL RECORD COFiY
~
.u,u V d.,i 4
o
pm u:ug p
1 UNITED STATES j
j NUCLEAR REGULATORY COMMISSION
/
o WASHINGTON, D.C. 30ee6-0001 April 9, 1998 Mr. Medin L. Bowling, Jr.
Recovery Officer-Millstone -
Unit No. 2 Northeast Nuclear Energy Company clo Ms. Patricia A. Loftus Director-Regulatory Affairs i
P. O. Box 128 -
Waterford, CT 06385
SUBJECT:
MILLSTONE NUCLEAR POWER STATION, UNIT NO. 3 - CHANGE TO -
I TECHNICAL SPECIFICATION BASES SECTION 3/4.5.2 (TAC NO. MA1283)
Dear Mr. Bowling:
By letter dated March 17,1998, Northeast Nuclear Energy Company (the licensee) submitted a change to Technical Specification (TS) Bases Section 3/4.5.2, "ECCS [ emergency core cooling system] Subsystems." The change addresses the method used to verify that the water filled portion of the recirculation spray system (RSS) is full of water.
In its March 17,1998, letter, the licensee stated that the TS require monthly surveillance verification that specified sections of emergency core cooling system piping are full of water. TS Bases Section 3/4.5.2 currently indicates " venting" as the method to be used, in its letter, the licensee stated that the design of the RSS thermal expansion loop piping was changed from normally laid-up-dry to normally filled with borated water. The licensee further stated that ultrasonic testing (UT) will be used each month as the extemal water level detection method to detect for a ventable gas quantity in the horizontal runs and to reverify liquid level in the 7 foot
{
thermal expansion loop risers. The use of a non-intrusive method (UT) is necessary as venting i
of the RSS thermal expansion loop piping would be a breach of the containment pressure
- boundary, i
The Millstone Unit 3 Plant Operating Review Committee approved the revision to Bases Section 3/4.5.2 on March 13,1998. The NRC staff has reviewed the change and has no objection to the wording. A copy of revised TS Bases page B 3/4 5-2 is enclosed.
Sincerely, i
a les W.
ndersen, Project Manager Special Projects Office - Licensing Office of Nuclear Reactor Regulation Docket No. 50-423
Enclosure:
Revised TS Bases page B 3/4 5-2 cc w/ encl:
See next page
I ENERGENCY CORE C0OLING SYSTEMS BASES ECCS SUBSYSTEMS (Continued)
The Surveillance Requirements provided to ensure OPERABILITY of each component' ensures that at a minimum, the assumptions used in the safety analyses are' met and that subsystem OPERABILITY is maintained. Surveillance Requirements for throttle valve position sto;,s and flow balance testing -
provide assurance that proper ECCS flows will be maintained in the event of a LOCA. Maintenance of proper fl e resistance and pressure drop.in the piping system to each injection point is necessary to:
(1) prevent total pump flow from exceeding runout conditions when the system is in its minimum resistance configuration, (2) provide the proper flow split between injection points in accordance with the assumptions used in the ECCS-LOCA analyses, and (3) provide an acceptable level of total ECCS flow to all injection points equal to or above that assumed in the ECCS-LOCA analyses.
Surveillance Requirement 4.5.2.b.1 requires verifying that the ECCS piping is full of water except for the operating centrifugal charging pump (s) and associated piping, and the RSS pump, the RSS heat exchanger and associated RSS piping. The ECCS pumps are normally in a standby, nonoperating mode, with the exce) tion of the operating centrifugal charging pump (s). As such, the ECCS flow pati piping has.the potential to develcp voids and pockets of entrained gases. Maintaining the piping from the ECCS pumps to the RCS full of water ensures that the system will perform properly when required to inject into the RCS. This surveillance Requirement is met by venting ECCS pump casings and the accessible discharge piping high points except for:
(1) the RSS pump, RSS heat exchanger and assoc?ated RSS piping that is not maintained filled with water during plant operation is excluded from the Surveillance Requirement, (2) the operating centrifugal charging pump (s) and associated piping is also excluded as an operating pump is self venting and cannot develop voids and pockets of entrained gases, and (3) the nonoperating centrifugal charging pumps do not have casing vent connections and the pump manufacturer indicates that venting the suction pipe will assure that the pump casing does not contain voids and pockets of entrained gases. The venting of the nonoperating centrifugal charging pumps is accomplished by venting with the suction line test connection. This surveillance requirement is met using an external water level detection method (as opposed to venting) for the water filled portions of RSS piping upstream of valves 3RSS*MV8837A/B and 3RSS*HV8838A/B, since venting would breach containment pressure boundary.
Enter LC0 action statement 3.6.2.2 if venting is deemed necessary.
Surveillance Requirement 4.5.2.C.2 requires that the visual inspection of the containment be performed at least once daily if the containment has been entered that day and when the final containment entry is made. This will reduce the number of unnecessary inspections and also reduce personnel exposure.
MILLSTONE - UNIT 3 B 3/4 5-2 Amendment No. Jpp, J #, J F,
Revised by NRC Letter dated April 9,19(
Nodhert Nucle:r Energy Comp ny Millst:n3 NuclIar Power Striisn Unit 3 cc:
Lillian M. Cuoco, Esquire Mr. William D. Meinert Senior Nuclear Counsel Nuclear Engineer Northeast Utilities Service Company Massachusetts Municipal Wholesale
]
P. O. Box 270 Electric Company Hartford, CT 06141-0270 P.O. Box 426 Ludlow, MA 01056 j
Mr. Kevin T. A. McCarthy, Director Monitoring and Radiation Division Joseph R. Egan, Esquire Department of Environmental Protection Egan & Associates, P.C.
79 Elm Street 2300 N Street, NW Hartford, CT 06106 5127 Washington, DC 20037 Regional Administrator, Region 1 Mr. F. C. Rothen U.S. Nuclear Regulatory Commission Vice President - Work Services 475 Allendale Road Northeast Utilities Service Company King of Prussia, PA 19406 P. O.' Box 128 Waterford, CT 06385 First Selectmen Town of Waterford Emest C. Hadley, Esquire Hall of Records 1040 B Main Street 200 Boston Post Road P.O. Box 549 Waterford, CT 06385 West Wareham, MA 02576 Mr. Wayne D. Lanning Mr. John Buckingham Deputy Director ofInspections Department of Public Utility Control Special Projects Office Electric Unit 1
l 475 Allendale Road 10 Liberty Square King of Prussia, PA 19406-1415 New Britain, CT 06051 i
Mr. M. H. Brothers Mr. James S. Robinson, Manager Vice President - Operations Nuclearinvestments and Administration Northeast Nuclear Energy Company New England Power Company P.O. Box 128 25 Research Drive Waterford, CT 06385 Westborough, MA 01582 Mr. M. R. Scully, Executive Director Mr. D. M. Goebel Connecticut Municipal Electric Vice President - Nuclear Oversight Energy Cooperative Northeast Utilities Service Company 30 Stott Avenue P. O. Box 128 Norwich, CT 06360 Waterford, CT 06385 Mr. David Amerine Deborah Katz, President Vice President - Nuclear Engineering Citizens Awareness Network i
and Support P.O. Box 83 Northeast Utilities Service Company Shelbume Falls, MA 03170 P. O. Box 128 Waterford, CT 06385 l
Northe:st Nucirr En:rgy Comp:ny Millstona Nucitar Power Station Unit 3 cc:
Mr. Allan Johanson, Assistant Director Mr. Don Schopfer Office of Policy and Management Verification Team Manager Policy Development and Planning Sargent & Lundy Division 55 E. Monroe Street 450 Capitol Avenue - MS# 52ERN Chicago,IL 60603
- P. O. Box 341441 Hartford, CT 06134-1441 Mr. J. P. McElwain Vice President (Acting)- Millstone 3 Citizens Regulatory Commission Northeast Nuclear Energy Company ATTN: Ms. Susan Perry Luxton P.O. Box 128 180 Great Neck Road
.Waterford, CT, 06385 Waterford, CT 06385 Mr. G. D. Hicks The Honorable Terry Concannon Unit Director-Millstone Unit 3 Nuclear Energy Advisory Council Northeast Nuclear Energy Company Room 4035 P.O. Box 128 Legislative Office Building Waterford, CT 06385 Capitol Avenue Hartford, CT 06106 Senior Resident inspector Millstone Nuclear Power Station Legislative Office Building clo U.S. Nuclear Regulatory Commission Captiol Avenue P. O. Box 513 Hartford, CT 06106 Niantic, Connecticut 06357 Mr. Evan W. Woollacott Attomey Nicholas J. Scobbo, Jr.
Co-Chair Ferriter, Scobbo, Caruso, Rodophele, PC Nuclear Energy Advi ory Council 1 Beacon Street,11th Floor 128 Terry's Plain Road Boston, MA 02108 Simsbury, CT 06070 Little Harbor Consultants, !nc.
Millstone -ITPOP Project Office P.O. Box C630 1
Niantic, CT 06357-0630 Mr. B. D. Kenyon Chief Nuclear Officer-Millstone Northeast Nuclear Energy Company P.O. Box 128 Waterford, CT 06385 Mr. Daniel L Curry Project Director Parsons Power Group inc.
2675 Morgantown Road Reading, PA 19607
.