Headquarters Daily Report
NOVEMBER 04, 1999
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REPORT NEGATIVE NO INPUT
ATTACHED INPUT RECEIVED RECEIVED
HEADQUARTERS X
REGION I X
REGION II X
REGION III X
REGION IV X
PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION IV NOV. 04, 1999
Licensee/Facility: Notification:
Nebraska Public Power District MR Number: 4-99-0025
Cooper 1 Date: 11/04/99
Brownville,Nebraska Resident Inspectors
Dockets: 50-298
BWR/GE-4
Subject: DROPPED CORE SHROUD BOLT IN SPENT FUEL POOL
Discussion:
On November 2, 1999, while operators were removing core shroud bolts from
the spent fuel pool, a cable clamp on the cable supporting one of the
bolts unfastened. The approximately 300 lb. bolt dropped 10 feet and hit
a "Tri-Nuke" brand filter canister located on the bottom of the spent
fuel pool, penetrating the canister and damaging at least one of the
filters.
Licensee personnel performing surveys and water analysis did not detect
an increase in radioactivity or radiation levels. They also performed a
visual inspection of the spent fuel pool liner and found it intact.
Operators did not detect increased leakage from the spent fuel pool
tell-tale drains. The licensee has established a team to investigate the
root cause of the event and evaluate options for removing the bolt from
the canister.
During the previous refuleing outage, operators had suspended each of the
shroud bolts from the side of the spent fuel pool by 3/8" steel cables.
The event occurred as operators moved the bolts for solid radioactive
waste processing. The movement was conducted in accordance with the
licensee's heavy loads procedure which contained administrative controls
to prevent moving the bolts over spent fuel.
Regional Action:
Cooper Nuclear Station is a Reactor Inspection Baseline Inspection
Program Pilot Plant. The resident inspectors are observing licensee
actions and evaluating the potential safety significance in accordance
with the baseline inspection program.
Contact: Charles S. Marschall (817)860-8185
David P. Loveless (817)860-8161
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