ML061010333

Slides Presented at April 6, 2006 Waterford 3 Meeting

ML061010333
Person / Time
Site:	Waterford
Issue date:	04/05/2006
From:	Entergy Operations
To:	Office of Nuclear Reactor Regulation
References
Download: ML061010333 (6)

Text

-- E~ntfgy Waterford 3 Emergency Diesel Generator Fuel Oil Storage Project NRC Overview April 5, 2006 Entorgy Objectives

• Increase margin by using EDG "rated capacity" method to calculate fuel storage requirements

• Increase margin by installing significantly more on site fuel oil storage capacity (40,000 gallons)

• Fully comply with EPU commitment

• Use standard No. 2 diesel fuel oil

• Slight reduction in FOST to reduce operator burden 2

1

-Entergy EPU Commitment To improve the fuel oil storage capability and provide a larger operational band, Waterford 3 commits to a design change to the onsite fuel oil storage system that will accommodate fuel oil storage volume equivalent to the fuel oil needed to run each DG for seven days based on calculational methods described in American National Standards Institute (ANSI) Standard N195-1976, "Fuel Oil Systems for Standby Diesel Generators." The modification will be completed by December 31, 2006. Supporting TS changes will be submitted as needed to support changes.

3 Entergy License Amendment Request

• Change to Technical Specification

- Relocate fuel oil requirements to new Technical Specification

- Increase the required capacity

- Maintain allowed time for capacity < 7 days but> 6 days

- Relocate FO Testing Program to Administrative TS

• Supporting Bases Changes 4

2

- En/oeW New Required Capacity

• Based on 7-day rated capacity of the Emergency Diesel Generator

• Includes margin for testing

• Provided in two tanks per train

- Existing safety related tank

- New non-safety related tank 5

-Entfrgy Required Capacity Comparison Current Proposed 55,000 Volume 38,000 Insafety related tank (gallons) 39,300 (5days) 17,000 in non-safety tank (2days + margin for testing)

Time dependent with exceptions Rated Capacity CaMculational -does not include 10% margin exeptity Method.Noecpin

-does not include testing volume Duration 7 days 7 days 6

3

-Enlergy Design Concept

• Install two new 20,000 gallon non-safety storage tanks connected to existing FOST fill stations

• Double walled tanks with dual submersible pumps powered by EDG's

• Industrial grade tanks and equipment

• Underground / missile protected tank and pumps

• Watertight / flood protected / hurricane proof e

Z~Entcrg~y Design Concept 8

4

Entcrgy Defense In Depth

• ANSI fuel oil storage calculational requirements fully met

• Leak detection indication provided

• Train separation maintained

• Design will be hurricane / flood proof Enfergy Defense In Depth

• DBA consumption (-5 gpm) equates to:

- >5 days fuel supply in each SR tank

- >2 days in each NS tank

• SR tanks cross-connected (active failure proof)

• Replenishment fuel is available from multiple area sources following DBA 10 5

i , .

-Enterfy Summary

• Proposal fully meets EPU Commitment

• Provides significant increase in fuel storage, controlled by TS

• Provides increased defense in-depth

• Reduces operator and chemistry burden

..

Entergy

• Questions?

12 6