ML19322D919
| ML19322D919 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse, Oconee, Crane  |
| Issue date: | 02/22/1980 |
| From: | Ahearne J NRC COMMISSION (OCM) |
| To: | Hart G SENATE, ENVIRONMENT & PUBLIC WORKS |
| Shared Package | |
| ML19322D920 | List: |
| References | |
| NUDOCS 8003110135 | |
| Download: ML19322D919 (2) | |
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UNITED STATES 8
NUCLEAR REGULATORY COMMISSION o
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February 22, 1980
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THIS DOCUMENT CONTAIN8
.. JJC Je The Honorable Gary Hart, Chairman POOR QUALITY PAGES
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'O Subcomittee on Nuclear Regulation
..SfS_. Committee on Environment and Public Works 6rfM;i United;. States Senate ~.
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Dear Mr.'- Chainnan; &,
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' ~ ~ ~' This responds to your letter of February 5,1980 that requests information
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on tM notification activities and followup work that was performed following transient events that occurred on June 13, 1975 at the Oconee Unit 3 nuclear facility, on September 24, 1977 at the Davis-Bessie nuclear facility and four events resulting in actuation of the high pressure ' injection system at Three Mile Island Unit 2.
A response to the additional questions regarding the condensate polishing system
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. at TMI-2 is also provided.
l In summary, the six events were included in monthly reports which were sent to lic~ nsees for information purposes but no action requirements e
or requests were made by the NRC.
The~NRC reviewed the six events individually and each was assessed not to be of the severity requiring specific notifications to be licensees or a report to Congress as an
" Abnormal Occurrence."
Detailed information on the notifications is presented in Section I, III, IV, V, VI, VII and VIII of Enclosure No. 1.
The Special Inquiry Group Report (p. 98) and the Report of the President's Commission (p. 66) also contain information on these matters.
i The followup effort for the six events included a routine Licensee Event Report (LER) evaluation of each event by the Office of Inspection and Enforcement (IE) and limited reviews by the Office of Nuclear Reactor Regulation (NRR) on some of the events.
Detailed infonnation on the followup effort is presented in Sections II, III, IV, V, VI, VII and
- VIII of Enclosure No.1.
In response to your question about actions taken to educe actuation
..of High Pressure Injection; the TMI-2 licensee submitted a request for a technical specification revision that would increase operational l
flexibility and reduce the number of actuations of High Pressure Injection (HPI). This request was reviewed by NRR and.the request l
was granted.
Details of this change are given in Section IX of Enclosure No.1.
The NRC was not informed of the chronic problems with the condensate 4 $
polisher system becau';e NRC regulations did not require any reports Q @g on events on this system; one event was mentioned in the license monthly report, only as an explanation for a plant outage.
Detai
-b are given in Section X of Enclosure No.1.
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The Honorable Gary Hart, Chainnan
- As a result of the TMI-2 accident and related studies, the Commission recognizes that substantial improvement and expansion of the NRC's operating experience assessment programs were required.
Therefore, I
the Comission has initiated several organizational changes, including establishing the Office for Analysis and Evaluation of Operational
. ;. Da ta. The clear mandate of the Comission's expanded and strengthened
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-. _._ program is to provide high confidence that the imediate and longer-M term safety concerns inherent in operating experience are properly
..... _ identified and effectively fed back to the NRC regulatory activities,
.n 7,,,..=gto~ reactor operators, and to licensee and vendor organizations. We i{$EiR5.,s?0uld,beyleased to_ provide additional information if you desire.-
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Enclosures:
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