ML082490481

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Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E2-39-VY, Vermont Yankee Transient Counting Status
ML082490481
Person / Time
Site: Vermont Yankee Entergy icon.png
Issue date: 07/23/2008
From:
- No Known Affiliation
To:
NRC/SECY/RAS
SECY RAS
References
06-849-03-LR, 50-271-LR, Entergy-Applicant-E2-39-VY, RAS M-301
Download: ML082490481 (1)


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EXHIBIT E2-39 Vermont Yankee Transient Counting Status: July 23, 2008 No of Transient No. of Actual Transient Cycles Assumed in Cycles Experienced Event / Transient Description Analysis for 60 Years To-Date Boltup and Unbolt of Reactor Vessel Head 123 32 Hydrostatic Pressure or Leak Test t 120 33 Startup = Heatup at 100 degrees F/hr 300 92 Turbine Roll & Increase to Rated Power 300 92 Reduction to 75% Rated Power and Return to 10,000 143 Rated Power Reduction to 50% Rated Power 2,000 79 and Return to Rated Power Turbine Trip at 25% Power 10 1 Feedwater Heater Bypass 70 1 Scram - Loss of Feedwater Pumps Isolation 10 3 Valves Close (3 HPCI Injections per Event)

Reactor Overpressure with Delayed Scram - 1 0 Feedwater Stays on, Isolation Valves Open Scram - Single Relief or Safety Valve 1 0 Blowdown Scram -Turbine. Generator Trip, Feedwater 268. 63 Stays on, Isolation Valves Open & All other Scrams Improper Start of a Cold Recirculation Loop 1 0 Sudden Start of Pump in a Cold Recirculation 1 0 Loop Reduction to 0% Power/Cooldown = Shutdown 300 90 at 100°F/hr Hot Standby (Feedwater Injection) 300 33 ASME Code (Pre-service) Hydrostatic Test to 1 1 1,563 psig (One time only event during plant life only)

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NRC Staff Other _ ___

DOCKETEDQ7 USNRC "____

August 12, 2008 (11:00am)

OFFICE OF SECRETARY RULEMAKINGS AND ADJUDICATIONS STAFF