Headquarters Daily Report
AUGUST 01, 2001
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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 III AUGUST 1, 2001
Licensee/Facility: Notification:
Exelon Generation Company, Llc MR Number: 3-01-0026
Byron 1 2 Date: 07/24/01
Byron,Illinois SRI Via Telecon
Dockets: 50-454,50-455
PWR/W-4-LP,PWR/W-4-LP
Subject: UNIT 2C STEAM GENERATOR PRIMARY TO SECONDARY LEAKAGE
Discussion:
On July 24, 2001, the licensee informed the Senior Resident Inspector of
an identified primary to secondary leak in the Unit 2C steam generator.
The initial leak rate was approximately 2-3 gallons per day (gpd) and
slowly increased to about 6-7 gpd on August 1, 2001. The leakage was
identified by slightly elevated radiation levels at the steam jet air
ejector exhaust, the steam generator blowdown system, and the main steam
line. At this time, the leakage is very low; however, the licensee has
implemented additional grab sampling at the steam jet air ejector
exhaust. The licensee has also created a higher level of awareness with
the operators. The administrative limits for shutdown are 75 gpd leakage
or an increase of greater than 30 gpd within 1 hour. Technical
Specification limits are 150 gpd on one steam generator or 600 gpd total.
Regional Action:
The resident inspectors are monitoring the activities with support from
regional specialists.
Contact: Ann Marie Stone (630)829-9729
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