ML20010D775
| ML20010D775 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 08/24/1981 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Morisi A BOSTON EDISON CO. |
| References | |
| NUDOCS 8108310284 | |
| Download: ML20010D775 (3) | |
Text
r
\\h k
,I '"%
Docket No. 50-253 (7
[l<.1(/[P,h b
I AUG 3 41981 fir. A. Victor fiorist y
Boston Edison Company
/WG O bOI A tt/C NUCLEAR
- "%',fgar,/
~
800 Boylston Street Boston, Massachusetts 02199 k
RE: PILGRIH HUCLEAR POWER STATION
Dear ftr. Morisi:
Dy letter dated July 2,1981, we inforced you that we were proposing to hold a meetino with you and other licenstes who have requested approval to operate at power levels above 50% with only one recirculation loop in service in the event the other loop is inoperative. The announced purpose of this meeting is to obtain a better understanding of what might have caused variations in jet punp flow and related parameters at Brouns Ferry Unit Fo. I during single loop operation and how this incident affects approval of your application. We had proposed a range of dates for the necting to acconodate the people expected to attend. Based on expressed preferences, the meeting on single loop operating experience will be held at 9:00 A.M., Wednesday, Septenber 9,1981 in Room P-Il8, Phillips Building, 7920 Horfolk Avenue, Bethesda, liaryland. The agenda, a copy of which is enclosed, is the sarie as that included with our pretious letter.
You are requested to advise your NRC project manager of the personnel who will be attending from your organization.
Sincerely, Originar Signed 13 T. A. 4:witcp 4
Thomas A. Ippolito, Chief Operating Reactors Branch #2 Division of Licensing
Enclosure:
Peeting Agenda cc w/ Enclosure See next page Distribution:
Docket File NSIC hbwhJw NRC PDR TERA Cwg Local POR S. Norris ORB #2 Reading ACRS (10)
D. Eisenhut J. Heltemes, AE0D OELD R. Clark OISE (3) g3
~
.3 g#2 yj.g#2 o,,.
..y sunnam )..gf.g/gj......ggfgj.....
~-
8108310284 810024 5fA OFFICIAL RECORD COPY usaro w -u m
s.:
5,-
Proposed Meeting with BWR Applicants and Licensees on Single toop Operation,
~~ ~.
Purpose of Meeting:
1.
To detennine what may have caused the, jet pump flow ~~ ~ h and other variations experienced by Browns Ferry" Unit 1 P
'duFing~ single 16'op~ operation ~and " ~
T, 2.
Evaluate knether the Browns Ferry experience should
~
result ir. power' limits for other BWRs operating on a single loop.
Agenda:
1.
Discussion of what may have caused the unexpected variations in operating parameters when Browns
..3 Ferry Unit i exceeded about 60 percent rated power while operating with only one recirculation loop.
2.
Discussion of parameters affected at Browns Ferry 1 (i.e. jet pump flow, neutron flux, core flow, core pressuredrop,etc.)
3.
Discussion of whether the Browns Ferry 1 experience
_.1 would be expected,at other BWRs operating on one recirculation loop.- If so, are safety limits likely.to -
be violated or cause complications with respect to core - --
""~
~~
stability, core flow symmetry, pump cavitation' or damage ~
to the jet pumps and reactor vessel internals.
4.
Discussion of the benefits vs. potential problems and cost of testing single loop operation in another BUR that is instrumented to detect what parameters are a f fect ed.
- 5. "Ev,aluation of whether single loop operation at po'wer levels about 50 to 55 percent is a safe and prudent means of reactor operation.
I g
' M D
g 4
p.
Mr. A. Victor Morisi Boston Edison Company j
CC:
1 Mr. Richard D. Machon Pilgrim Station Manager Boston Edison Company RFD #1, Rocky Hill Road Plymouth, Massachusetts 02360 Henry Herrmann, Esquire Massachusetts Wildlife Federation 151 Tremont Street Boston, Massachusetts 02111 Plymouth Public Library North Street Plymouth, Massachusetts 02360 Resident Inspector c/o U. S. NRC P. O. Box 867 Plymoutn, Massachusetts 02360 Ron E. Engle, Manager Reload Fuel Licensing (MC 682)
General Eiectric Company 4
San Jose, California 95125 l
1 i
i 5
l I
e J
4 e
- _ _ _ _ _ _ _., _,, _ _ _ _ _.. -, -. - _.,,... -. _.,.