ML19344A367
| ML19344A367 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/08/1980 |
| From: | Ronald Bellamy, Jay Collins, Poindexter T Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| PNO-TMI-80-043, PNO-TMI-80-43, NUDOCS 8008200020 | |
| Download: ML19344A367 (2) | |
Text
PRELIMINARY NOTIFICATION August 8, 1980 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-TMI-80-43 This preliminary notification constitutues EARLY notice of events of POSSIBLE safety or public interest significance.
The information presented is as initially received without verification or evaluation and is basically all that is known by NRC staff on this date.
Facility: Metropolitan Edison Company Three Mile Island, Unit 2 Middletown, Pennsylvania Docket Number 50-320
Subject:
OPENING OF DECAY HEAT VALVE At 1:00 p.m., today, one of the reactor coolant system's boundaries was extended by controlled and planned procedures.
The boundary was previously located within the containment building, but is presently at the 280'6" elevation piping of the decay heat removal system in the fuel handling building.
This boundary change was achieved by opening decay heat valve #1. This was necessary to permit the near future operation of the mini-decay heat removal system.
The valve that was opened (DH-V1) is located in the piping that would normally take suction from the reactor vessel for decay heat system operation.
The valve has been closed since before the TMI accident.
Isolation of the reactor coolant system is presently being maintained by valve OH-V3 which is downstream of DH-V1, just before the mini-decay heat system tie-in.
Media interest has been expected because of public sensitivity to TMI related events.
The Comonwealth of Pennsylvania has been informed.
The NRC has not made plans to issue a press release.
This preliminary notification is issued for information only and no further action by the NRC is anticipated.
The NRC TMI Program Office received notificatiQn.of this occurrenc from the licensee..
f'.h.. d -
\\Mb~d M'
. T.Ma J/f/J7
Contact:
T. C. Poinddxter 590-3995 R. R. Bellamy 590-3957 Collins 590-3955 Distribution:
(Facsimile Transmission Times Noted)
H St Bldg o2.'8/
Chairman Ahearne Commissioner Bradford S. J. Chilk, SECY Commissioner Gilinsky Conunissioner Hendrie C. C. Kammerer. CA ACRS (For Distribution)
MNB B1dg J.*g 7_
P. B1dg
).'sY IE:X00S 7.'9f(IE:HQ Dist.)
W. J. Dircks ED0 H. R. Denton, NRR C. Micnelson, AED0
N. M. Haller, MPA S. Hanauer, NRR (6 min /page)
W. Kerr, OSP D. Eisenhut, NRR J. J. Cummings, 0IA H. K. Shaper, ELD R. H. Vollmer, NRR B. J. Snyder, NRR 80 08 2 00 O lo
f PNO-TMI-80-43 (cont) 2 August 8, 1980 (MAIL)
Region I J.* d /
R. Minogue, SD Region II 3 :o '/
Willste Bldg 3l00 IE:XOOS Region III 2.07 J. G. Davis, NMSS Document fianagement Br Region IV 3 *./ 1 R. Budnitz, RES (ForPDR/LPDR)
Region V 3 :/5 PRELIMINARY NOTIFICATION i
l i
4 t
e 9
..e-.
-