ML19323D671
| ML19323D671 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 04/28/1980 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Mcdonald R TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 8005220120 | |
| Download: ML19323D671 (2) | |
Text
/
'o, UNITED STATES Sy g
NUCLEAR REGULATORY COMMISSION g
,,.c
- , e REGION li o
- /
/
101 MARIETTA ST N.W., SUITE 3100 ATLANTA, G EORGIA 30303 APR 2 81980 In Reply Refer To:
RII:JPO,
~50-348 _'
. w.0-364 /
5 Alabama Power Company Attn:
R. P. Mcdonald Vice President-Nuclear Generation Post Office Box 2641 Birmingham, AL 35291 Gentlemen:
The enclosed Circular No. 80-09 is forwarded to you for information.
No written response is required; however, should you have any questions regarding the Circular or its recommendations, please contact this office.
Sincerely, James P. O'Reilly Director
Enclosures:
1.
IE Circular No. 80-09 2.
L.st of lE Circulars Recently Issued e
W" 800s220 '2 0'
/
APR 2 81980 Alabama Power Company 2 \\
cc w/ enc 1:
A. R. Bartan Executive Vice President Post Office Box 2641 Birmingham, Alabama 35291 F. L. Clayton, Jr.
Senior Vice President Post Office Box 2641 Birmingham, Alabama 35291 J. W. McGowan Manager-Operations Quality Assurance Post Office Box 2641 Birmingham, Alabama 35291 O. D. Kingsley, Jr.
Manager, Nuclear Engineering and Technical Services Post Office Box 2641 Birmingham, Alabama 35291 H. O. Thrash Manager, Nuclear Generation Post Office Box 2641 Birmingham, Alabama 35291 W. C. Petty Manager-Quality-Design Assurance (Design and Construction)
Post Office Box 2641 Birmingham, Alabama 35291 W. G. Hairston, III Plant Manager Drawer 470 Ashford, Alabama 36312 R. E. Hollands, Jr.
QA Supervisor Post Office Box U Ashford, Alabama 36312 l
L p
a v
-m.
l
_.. = _
u SSINS No.: 6830 Accession No.:
UNITED STATES 8002280663 NUCLEAR REGULATORY COM'!ISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 April 28, 1980 IE Circular No. 80-09 PROBLEMS WITH PLANT INTERNAL COMMUNICATIONS SYSTEMS Description of Circumstances at the Kewaunee Power Plant:
On January 17, 1980, the Kewaunee Nuclear Power Plant lost offsite power to its 4160V non-safeguards buses.
Since the system used for internal communica-tions, paging and evacuation alarm purposes (Gai-tronics) was powered from a non-safeguards bus, plant communications were degraded during the outage.
This degraded condition persisted until power was restored to the affected bus thru an emergency safeguards bus. While in the degraded mode, the licensee used two-way portable radios for internal communications. The radios performed satisfactorily, per se; however, when transmitting in the vicinity of certain electronic equipment, they induced false signals into the electrsnic equipment.
Description of Circumstances at the Davis-Besse Power Sts on:
On October 15, 1979, the Davis-Besse Power Station lost all offsite power.
During the period when offsite power was not available, the licensee noted that the internal three digit telephones (GTE) would not function.
In addition, the NRC " Red Phone" was subsequently reported to have been out of se rvice. Other licensee phone systems (Gai-tronics and the outside four digit Ohio Bell phones) did work.
Following this event, the licensee provided emergency power to its phones and the NRC took action through.AT&T to provide emergency power to all Red Phones.
(Note: Although the communications system at Davis-Besse was not designed to meet the single failure criterion, its FSAR states that the main internal communications system is supplied by two redundant power feeders from the uninterruptable instrumentation distribution panels.)
Recommended Action for Licensees and Holders of Construction Permits All licensees of nuclear power reactors and holders of construction permits should be aware of the potential problems described above. Because of the generic implications of the above problems, it is recommended that the following actions be considered:
1.
Determine the source of power for plant internal communications systems; 2.
Upgrade the internal communications systems to assure operability during the loss of offsite power or other foreseeable events;
--.=:
..a.-..----.-----
-- -.~-.. - -.. -- -
I
-o t
IE Circular No. 80-09 April 28, 1980 Page 2 of 2 3.
Determine whether any plant electronic equipment may be adversely affected by portable radio transmissions. This determination should include, but not be limited to, the computer system, electro-hydraulic system, and nuclear instrumentation system; and 4.
Instruct employees on the use of radios in areas susceptible to electro-magnetic interference.
No written response to this Circular is required; however, if additional information regarding these matters is required, contact the Director of the appropriate NRC Regional Office.
t 5
il J
m
g IE Circular No. 80-09
~
Enclosure April 28, 1980 RECENTLY ISSUED IE CIRCULARS Circular Subj ect Date of Issued to No.
Issue 80-09 Problems with Plant Internal 4/28/80 All holders of a power Communications Systems reactor OL or CP 80-08 BWR Technical Specification 4/18/80 All General Electric Inconsistency - RPS Response BWR's holding a power Time reactor OL 80-07 Problems with HPCI Turbine 4/3/80 All holders of a power Oil System reactor OL or CP 80-06 Control and Accountability 4/14/80 Medical licensees in Systems for Implant Therapy Categories G and G1 Sources 80-05 Emergency Diesel-Generator 4/1/80 All holders of a power Lubricating Oil Addition and reactor OL or CP Onsite Supply 80-04 Securing of Threaded Locking 3/14/80 All holders of a power Devices on Safety-Related reactor OL or CP Equipment 80-03 Protection from Toxic Gas 3/6/80 All holders of a Hazards power reactor OL 80-02 Nuclear Power Plant Staff 2/1/80 All holders of Reactor Work Hours OLs, including research and test reactors, and cps 80-01 Service Advice for GE 1/17/80 All licensees of Induction Disc Relays nuclear power reactor operating facilities and holders of nuclear power reactor cps 79-25 Shock Arrestor Strut 12/20/79 All licensees and Assembly Interference holdare of power reactor Ces t
. -..~..-.,,--- _,
. -.