United States Nuclear Regulatory Commission - Protecting People and the Environment

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 
Page Last Reviewed/Updated Tuesday, July 23, 2013