ML19289D330

Forwards LERs 78-066/99X-1,78-107/03L-1, & 78-083/03L-1

ML19289D330
Person / Time
Site:	Davis Besse
Issue date:	02/22/1979
From:	Murray T TOLEDO EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19289D331	List: 05000346/LER-1978-066-99, /99X-1:on 780429,during Operation at 20% Power, RCS Pressure Dropped to Approx 1620 Psig & Safety Features Actuation Sys Channels 1 & 3 Tripped on RCS Low Pressure, Initiating Incident Levels 1 & 2 05000346/LER-1978-083-03, /03L-1 on 780720:containment vessel-to-annulus Differential Pressure Exceeded Tech Spec Limit by 1 Inch. Purge of Containment Bldg Commenced.Caused by Inadequate Monitoring of Pressure Increase by Shift Check 05000346/LER-1978-107-03, /03L-1 on 781031:during Diesel Generator Monthly Test,Room Temp Rose to 110 F & Outside Air Damper Would Not Open.Caused by Damper Linkage Being Out of Adjustment & Bound in Guide ML19289D330
References
L79-148, NUDOCS 7903050337
Download: ML19289D330 (1)

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n J TOLEDO G EDISON February 22, 1979 L79-148 FILE: RR 2 (NP-33-78-100, NP-33-78-125, h7-30-78-01)

Docket No. 50-346 License No. NPF-3 Mr. James G. Keppler Regional Director, Region III Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Dear Mr. Keppler:

Enclosed are three copies of Licensee Event Reports78-083 (h7-33-78-100),78-107 (NP-33-78-125), and 78-066 (NP-30-78-01), which have been revised to indicate the corrected cause codes and cause subcodes in blocks 12 and 13, respectively. There has been no change made to the supplemental information sheets accompanying these Licensee Event Reports. The revisions are indicated by a "1" in the lef t margin.

Please replace your previous copies of Licensee Event Reports78-083, 78-107 and 78-066 with the attached revised copies.

Yours, truly, rm o%g Terry D. Murray Station Superintendent Davis-Besse Nuclear Power Station TDM/ljk Enclosures cc:

Dr. Ernst Volgenau, Director Office of Inspection and Enforccment Enc 1:

30 copies each LER Mr. William G. Mcdonald, Director Office of Management Information and Program Control Encl:

3 copies each LER T

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7903050 3 3 7

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THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MADISON AVENUE TOLEDO. CH:0 43652