Bulletin 80-15: Possible Loss of Emergency Notification System (ENS) With Loss of Offsite Power
SSINS No.: 6820
Accessions No.:
8005050072
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D.C. 20555
June 18, 1980
IE Bulletin No. 80-15
POSSIBLE LOSS OF EMERGENCY NOTIFICATION SYSTEM (ENS) WITH LOSS OF OFFSITE
POWER
In the past year, there have been two occurrences where a loss of off-site
power has resulted in a loss of communications between a power reactor
facility and the NRC Operations Center via the Emergency Notification System
(ENS). The most recent occurrence was at Indian Point Unit 2 on June 3,
1980. The earlier event occurred at the Davis Besse facility on October 15,
1979 and resulted in the issuance of IE Circular 80-09.
The installation of the ENS requires a station package which operates on 110
VAC. In some cases, the station package is located at the local telephone
company which supplies the required power for normal operation and emergency
power for operation during abnormal occurrences, but in many cases, the
package is located at the site and is served by on-site power. In some cases
where the station package is served by on-site power, the station package
has not been backed up by emergency power.
NRC data indicates that the station packages for each facility are powered
in the manner described in the two enclosures.
Actions to be taken by all licensees:
1. Within 10 days of the date of this Bulletin, verify by direct
inspection, in conjunction with the appropriate telephone company
representative, that the ENS at your facility is powered in the
manner described in the two enclosures.
2. Those facilities which have station packages requiring on-site
power, but which are not connected to a safeguards instrumentation
bus which is backed up by batteries and an inverter or equally
reliable power supply, shall make necessary modifications and
provide such a connection.
3. All facilities are to develop and conduct a test, within 60 days
of the issuance of this Bulletin, to verify that all extensions of
the ENS located at your facility(ies) would remain fully operable
from the facility(ies) to the NRC Operations Center in the event
of a loss of offsite power to your facility(ies). This is not
intended to mean that an actual loss of offsite power be executed.
.
IE Bulletin No. 80-15 June 18, 1980
Page 2 of 2
4. If it is determined that a station package requiring on-site power
is not connected to a safeguards instrumentation bus backed up by
automatic transfer to batteries and an inverter or an equally
reliable power supply, notify the NRC Operations Center via the
ENS within 24 hours after such determination.
5. Prepare and issue an administrative procedure or directive which
requires notification to the NRC Operations Center by commercial
telephone or relayed message within one hour of the time that one
or more extensions of the ENS located at your facility(ies) is
subsequently found to be inoperable for any reason.
6. Provide a written report, within 75 days of the issuance of this
Bulletin, describing the result of the reviews required by items
1 and 2 above, the results of the testing required by item 3 and
the procedures required by item 5.
This information is requested under the provisions of 10 CFR 50.54(f).
Accordingly, you are requested to provide within the time periods specified
in item 6 above, written statements of the above information, signed under
oath or affirmation.
Reports shall be submitted to the Director of the appropriate NRC Regional
Office and a copy forwarded to the Director, NRC Office of Inspection and
Enforcement, Washington, D.C. 20555.
Approved by GAO, B180225 (R0072): clearance expires 7-31-80. Approval was
given under a blanket clearance specifically for identified generic
problems.
Enclosures: 1. Facilities With "Hotline" Powered
By Local Telephone Company
2. Facilities With "Hotline" Using
On-Site Power
.
Facilities With "Hotline" Powered By Local Telephone Company
Region I
B&W Leechburg/Apollo
Beaver Valley l
Calvert Cliffs 1 & 2
Fitzpatrick
Ginna
Indian Point 2
Indian Point 3
Millstone 1 & 2
NFS-West Valley
Nine Mile Point 1
Three Mile Island 1 & 2
TI-Attleboro
Westinghouse Cheswick
Region II
Hatch 1 & 2
NFS-Erwin
Region III
Cook 1 & 2
Dresden 1, 2 & 3
Duane Arnold
Kerr McGee Cresent
La Crosse
Monticello
Palisades
Point Beach 1 & 2
Quad Cities 1 & 2
Region V
Exxon Richland
General Atomics LaJolla
Rockwell Canoga Park
San Onofre
Trojan
Enclosure 1
.
Facilities With "Hotline" Using On-Site Power
Region I
Haddam Neck
Maine Yankee
Oyster Creek
Peach Bottom 2 & 3
Pilgrim 1
Salem 1 & 2
UNC-Montville
UNC-Wood River Junction
Vermont Yankee
Yankee Rowe
Region II
B&W LRC- Lynchburg
B&W Navy-Lynchburg
Browns Ferry 1, 2 & 3
Brunswick 1 & 2
Crystal River
Farley 1
North Anna 1 & 2
Oconee 1, 2 & 3
Robinson 2
Sequoyah 1
St. Lucie 1
Surry 1 & 2
Turkey Point 3 & 4
Region III
Big Rock Point
Davis-Besse
Kewaunee
Prairie Island 1 & 2
Zion 1 & 2
Region IV
Arkansas Nuclear One, 1 & 2
Cooper
Fort Calhoun
Fort St. Vrain
Region V
Diablo Canyon
Rancho Seco
Enclosure 2
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