ML19256B238
| ML19256B238 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 04/14/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Wachter L NORTHERN STATES POWER CO. |
| References | |
| NUDOCS 7906070018 | |
| Download: ML19256B238 (1) | |
Text
f T
f
.f, 8
'4'o, UNITED STATES f.
NUCLEAR REGULATORY COMMISSION f *,'l
/_
j REGloN 111 C
799 ROOSEVELT Ro AD e,.s yg P
GLEN E LLYN ILLINOIS 60137 o e...*
April 14, 1979 Docket No. 50-263 Northern States Power Compuny ATTN:
Mr. Leo Wachter Vice President Power Production and System Operation 414 Nicollet Mall Minneapolis, MN 55401 Gentlemen:
Enclosed is IE Bulletin No. 19-08, which requires action by you with regard to your power reactor facility with an operating licenee.
Should you have any questions regarding this Bulletin or the actions required by you, please contact this office.
Sincerely, James G. Keppler Director
Enclosure:
IE Bulletin No. 79-08 cc w/ encl:
Mr. L. R. Eliason, Plant Manager Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC p
Anthony Roisman, Esq.,
Attorney John W. Ferman, Ph.D.
Nuclear Engineer 7906070OG
4 1
U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT REGION III April 14, 1979 IE Bulletin No. 79-08 EVENTS RELEVANT TO BOILING WATER POWER REACTORS IDENTIFIED DURING THREE MILE ISLAND INCIDENT Description of Circumstances:
On march 28. 1979 the Three Mile Island Nuclear Power Plant, Unit 2 experienced core damage which resulted from a series of events which were initiated by a loss of feedwater transient.
Several aspects of the incident may have general applicability to operating boiling water reactors. This bulletin requests certain actions of licensees of operating boiling water imactors.
Actions to be taken by Licensees:
For all Boiling water reactor facilities with an operating license complete the actions specified below:
1.
Review the description of circumstances described in Enclosure 1 of IE Bulletin 79-05 and the preliminary chronology of the TMI-2 3/28/79 accident included in Enclosure 1 to IE Bulletin 79-05A.
a.
This review should be directed toward understanding:
(1)the extreme seriousness and consequences of the simultaneous blocking of both trains of a safety system at the Three Mile Island Unit 2 plant and other actions taken during the early phases of the accident; (2) the apparent operational errors which led to the eventual core damage; and (3) the necessity to systematically analyze plant conditions and parameters and take appropriate corrective action, b.
Operational personnel should be instructed to (1) not override automatic action of engineered safety features unless continued operation of engineered safety features will result in unsafe plant conditions (see Section 5a of this bulletin); and (2) not make operational decisions based solely on a single plant parameter indication when one or more confirmatory indications are available.
DUPLICATE DOCUMENT Entire document previously entered into system under:
ANO d Y2 [d M N o.
of pages:
-