ML20236D286
| ML20236D286 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 10/21/1987 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20236D277 | List: |
| References | |
| RTR-REGGD-01.097, RTR-REGGD-1.097 NUDOCS 8710280117 | |
| Download: ML20236D286 (2) | |
Text
_ _ _ _ _ - -
I f.
[M UNITED STATES
'i
. NUCLEAR REGULATORY COMMISSION 5
l WASHINGTON, D, C. 20555 j
k.....,/
l SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION NORTHEAST NUCLEAR ENERGY COMPANY, Et A1.
REGULATOPY GUIDE 1.97 CONTAINMENT SUMP WATER TEMPERTAUPE MONITOR MILLSTONE NUCLEAR p0WER STATION, UNIT NO. 3 DOCKET NO. 50-423
1.0 INTRODUCTION
By letters dated December 9, 1985, November 17, 1986, and May 1 1987 Northeast Utilities submitted requests for a deviation from the recommendations of Regulatory Guide (R.G.) 1.97, Revision 2, to use Category 3 instrumentation to monitor the. containment sump water temperature and a delay in the installation.of Category 2 containment sump water temperature instrumentation for the Millstone Nuclear Power Station, Unit No. 3.
R.G.1.97, Revision 2, reconinends Category 2 containment sump water 1
temperature instrumentation to monitor the operation of the containment cooling systems. The licensee has installed Category 3 instrumentation to monitor this variable that, except for environmental qualification, meets the criteria for Category-2 instrumentation.
1 l
The license.e has also requested that, if Category 2 instrumentation is required, the schedule.to install and have operational Category 2 instrumentation to monitor containment sump water temperature be delayed until prior to startup l
following the second refueling outage.
2.0 EVALUATION The licensee states that no automatic or manual actions are initiated based on the containment sump water temperature. The licensee states further that the containment sump water temperature indication is not used by the operator to I
take any type of corrective action and it is not used in any of the unit's I
emergency operating procedures. The licensee states that the net positive suction head of the ECCS pump operation is assumed regardless of sump temperature.
i
\\
'The staff is currently generically reviewing the need for Category 2 instru-L mentation to monitor containment sump water temperature. The staff finds the i ting containment sump water temperature Category 3 instrumentation
- @8'.
ex sacceptable for operation while the staff's generic review of the need for
-ar a po Category 2 instrumentation to monitor this variable is ongoing. The staff l
co o finds that license condition P.C(6) "NNEC0 shall install and have o)erational instrumentation to monitor containment sump water temperature at me Q
t1e first scheduled outage of sufficient duration after procurement is complete om but no later than startup after the first refueling outage" has been met.
P However, the issue of whether Category 2 instrumentation should be provided L
shall remain open until the staff completes its generic review.
j sa' N
Dated:
j Principal Contributor:
B. Marcus
....i
l Mr. E. J. Mroczka Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit No. 3 CC:
Gerald Garfield,. Esq.
Ms. Jane Spector l
Day, Berry & Howard Federal Energy Regulatory Commission City Place 825 N. Capitol Street, NE Hartford, Connecticut 06103-3499 Room 8608C Mr. Maurice R. Scully, Executive Director Mr. Kevin McCarthy, Director Connecticut Municipal Electric Radiation Control Unit Energy Cooperative Department of Environmental Protection 268 Thomas Road State Office Building Groton, Connecticut 06340 Hartford, Connecticut 06115 Robert W. Bishop, Esq.
Burlington Electric Department Corporate Secretary c/o Robert E. Fletcher, Esq.
Northeast Utilities 271 South Union Street Post Office Box 270 Burlington, Vermont 05402 Hartford, Connecticut 06141 Mr. William J. Raymond Senic.r Resident Inspector Office U. S. Nuclear Regulatory Commission Millstone III P. O. Box 811 Niantic, Connecticut 06357-08 Mr. Michael L. Jones, Manager Project Management Department Massachusetts Municipal Wholesale Electric Company Post Office Box 426 Ludlow, Massachusetts 01056 Regional Administrator U. S. NRC, Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Mr. Karl Abraham Public Affairs Office, Region !
U. S. Nuclear Regulatory Comission, King of Prussia, Pennsylvania 19406