Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
GL80003
UNITED STATES
NUCLEAR REGULATORY COMMISSION
WASHINGTON, D. C. 20555
January 10 1980
Docket No. 50-298
Mr. J. M. Pilant
Licensing and Quality Assurance
Nebraska Public Power District
P. O. Box 499
Columbus, Nebraska 68601
Dear Mr. Pilant:
In response to our letter of August 29, 1978, you provided information
on your 1977 experience of control rods failing to fully insert. We
evaluated your response along with those provided by other BWR owners.
We concluded that such events are general and that the frequencies of
occurrence vary among the BWRs, apparently because of different
maintenance programs.
Our August 29, 1978 letter recommended that you maintain an ongoing
tabulation of any additional such events. To determine whether or not
the frequency of these events has changed for a given plant, we now
request that you report your more recent experience. This report should
include the experience from the time of the last reported occurrence
through 1979. In addition please provide a summary of other control rod
drive malfunctions, such as unlatchings, for the same time period.
The information should be provided within 90 days. for each event,
identify the number of rods not fully inserted, the position of the
rods, the cause for failure to fully insert, and any related
maintenance activities.
This request for additional generic information is in accordance with
the GAO blanket clearance number B-180225 (R0536) which expires June
30, 1981.
Sincerely,
Thomas A. Ippolito, Chief
Operating Reactors Branch #3
Division of Operating Reactors
8002130200
.
Mr. J. M. Pilant
Nebraska Public Power District - 2 -
cc:
Mr. G. D. Watson, General Counsel
Nebraska Public Power District
P. O. Box 499
Columbus, Nebraska 68501
Mr. Arthur C. Gehr, Attorney
Snell & Wilmer
3100 Valley Center
Phoenix, Arizona 85073
Cooper Nuclear Station
ATTN: Mr. L. Lessor
Station Superintendent
P. O. Box 98
Brownville, Nebraska 68321
Auburn Public Library
118 - 15th Street
Auburn, Nebraska 68305