Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, D.C. 20555
February 27, 1989
Information Notice No. 88-73, SUPPLEMENT 1: DIRECTION-DEPENDENT LEAK
CHARACTERISTICS OF
CONTAINMENT PURGE VALVES
Addressees:
All holders of operating licenses or construction permits for nuclear power
reactors.
Purpose:
This information notice supplement is being provided to present information
provided by Fisher Controls International, Inc. on the characteristics of
containment purge valves described in Information Notice No. 88-73. It is
expected that recipients will review the information for applicability to
their facilities and consider actions, as appropriate, to avoid similar
problems. However, suggestions contained in this information notice do not
constitute NRC requirements; therefore, no specific action or written response
is required.
Discussion:
The NRC issued Information Notice No. 88-73 to all holders of operating
licenses or construction permits for nuclear power reactors to provide
information on an event at the Diablo Canyon Nuclear Power Plant, Unit 1,
involving unexpected direction-dependent leakage through containment purge
valves. These valves were Fisher Controls Series 9200 butterfly valves.
After the issuance of Information Notice No. 88-73, Fisher Controls provided
additional information to their customers and the NRC on the direction-
dependent leak characteristics of the Series 9200 valves. This information is
being provided as Attachment 1. Any questions or clarifications regarding the
Fisher information may be obtained by contacting the appropriate Fisher
Controls representative.
8902210351
. IN 88-73, Supplement 1
February 27, 1989
Page 2 of 2
No specific actions or written response is required by this information
notice. If you have any questions about this matter, please contact the
technical contact listed below or the Regional Administrator of the
appropriate regional office.
Charles E. Rossi, Director
Division of Operational Events Assessment
Office of Nuclear Reactor Regulation
Technical Contact: Jaime Guillen, NRR
(301) 492-1170
Attachments:
1. Fisher Anomaly Notice No. FAN 88-2
2. List of Recently Issued NRC Information Notices
. Attachment 2
IN 88-73, Supplement 1
February 27, 1989
Page 1 of 1
LIST OF RECENTLY ISSUED
NRC INFORMATION NOTICES
_____________________________________________________________________________
Information Date of
Notice No._____Subject_______________________Issuance_______Issued to________
89-20 Weld Failures in a Pump 2/24/89 All holders of OLs
of Byron-Jackson Design or CPs for nuclear
power reactors.
89-19 Health Physics Network 2/23/89 All holders of OLs
or CPs for nuclear
power reactors,
and the following
fuel facilities:
Nuclear Fuel
Services of Erwin,
General Atomic,
UNC Montville, B&W
LRC Lynchburg, and
B&W Lynchburg.
89-18 Criminal Prosecution of 2/22/89 All holders of OLs
Wrongdoing Committed by or CPs for nuclear
Suppliers of Nuclear power reactors.
Products or Services
89-17 Contamination and Degra- 2/22/89 All holders of OLs
dation of Safety-Related or CPs for nuclear
Battery Cells power reactors.
89-16 Excessive Voltage Drop 2/16/89 All holders of OLs
in dc Systems or CPs for nuclear
power reactors.
89-15 Second Reactor Coolant Pump 2/16/89 All holders of OLs
Shaft Failure at Crystal or CPs for nuclear
River power reactors.
89-14 Inadequate Dedication 2/16/89 All holders of OLs
Process for Commercial or CPs for nuclear
Grade Components Which power reactors.
Could Lead to Common Mode
Failure of a Safety System
89-13 Alternative Waste Management 2/8/89 All holders of NRC
Procedures in Case of Denial specific licenses.
of Access to Low-Level Waste
Disposal Sites
_____________________________________________________________________________
OL = Operating License
CP = Construction Permit
