ML19254D959
| ML19254D959 | |
| Person / Time | |
|---|---|
| Issue date: | 10/03/1979 |
| From: | Rehm T NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
| To: | NRC COMMISSION (OCM) |
| Shared Package | |
| ML19254D960 | List: |
| References | |
| NUDOCS 7910300364 | |
| Download: ML19254D959 (2) | |
Text
PD L
/
October 3, 1979 For:
The Comissioners From:
T. A. Rehm, Assistant to the Executive Director for Operations
Subject:
WEEKLY INFORMATION REPORT - WEEK ENDING SEPTEMBER 28, 1979 A sumary of key events is included as a convenience to those Comissioners who may prefer a condensed version of this report.
Contents Enclosure Administration A
Nuclear Reactor Regulation B
Standards Development C
Nuclear Msterial Safety and Safeguards D
Inspection and Enforcement E
Nuclear Regulatory Research F
Executive Legal Director G
International Programs H
State Programs I
Management and Program Analysis J
Controller K*
Calendar of Significant Events L
Items Approved by the Comission M**
Calendar of $ peaking Engagements N
~
v./
/
. A. Re ss d ant to the
.Executive Director for Operations
Contact:
T. A. Rehm j22')
{/'3 49-27781
- No input this week.
- Deleted from Comissioners and PDR copy.
7010300
-4
SUMMARY
OF KEY EVENTS UEEK ENDING SEPTEMBER 28, 1979 North Anna 1 At 0609 on September 25, 1979, a turbine trip, caused by a high level in a feed heater drain cooler resulting from a tube rupture in the cooler, caused the reactor to trip.
Excessive cooldown caused by an open steam dump resulted in an RCS depressurization and an initiation of the safety injection of the Emergency Core Cooling System. Upon securing safety injection, RCS charging and letdown was reestablished.
During this period, radioactivity was released to the. auxiliary building. The radioactivity was not significant.
GETR (50-70)
By letter dated September 27, 1979, the NRC provided its safety evaluation to the General Electric Company regarding the proper seismic / geologic design bases for the GETR. GETR was ordered shutdown on October 24, 1977 because of evidence of faulting at the site. The design bases for surface offset and combined loads are in excess of those proposed by GE.
Due to the staff's conclusion that a 2-1/2 meter surface effort is possible, we will not continue our evaluation of the GETR facility which GE has analyzed for a 1 meter offset.
Psychological Effects of TMI on the General Population Two medical doctors have initiated several research tasks to study the pyschological effects of the TMI accident.
It is our assessment from the limited information provided to us that the studies are unique in important respects and would be of considerable value in understanding the nature and magnitude of psychological stress crea'ed by the TMI accident. We are exploring the feasibility and possible scope of a contract with the Hershey Medical Center.
PBF A nuclear LOCA blowdown test was performed in the PBF September 21, 1979 to examine a clad temperature regime where extensive clad ballooning and possible channel flow blockage might occur. Several coolant check valves did not function as planned, consequently only one of the four test rods was heated to the target temperature range.
Differing Professional Opinions Prepared the proposed oolicy and procedures for handling differing views in the Federal Register format. Comment period will be sixty days.
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