### Tetra Tech, Inc.

10306 Eaton Place, Suite 340 Fairfax, VA 22030 phone 703
- 385
- 6000 fax 703
- 385
- 6007

DATE: August 2, 2010
TO : Paul Shriner, EPA
FROM : Kelly

Meadows,
SUBJECT: Nuclear uprate schedule As requested, we have examined existing information on uprates at nuclear facilities. As shown in the attached fact sheet from the Nuclear Regulatory Commission (NRC), there are three t ypes of uprate: measurem The increase s in generating capacity associated with these uprates are less than 2%, 2 and up to 20% respectively

. could be used to offs et some or all of the capacity l ost to the energy penalty from retrofitting to closed

- cy cle cooling. Table 1 below summarizes the projected uprates in the coming years, as provided by NRC data. 1 

### Table 2 shows a summary of how many

facilities have underta of uprate in the past. Table 1. Scheduled Nuclear Uprates

Fiscal Year Total

Power Uprates Me asurement

Uncertainty Recapture Power Uprates 2010 4 2011 17 2012 10 2013 5 2014 4 TOTAL 40 Source: NRC fact sheet, February 2008.

1 Updated data may be periodically posted by the NRC at http://www.nrc.gov/reactors/operating/licensing/power 

# MEMORANDUM

10306 Eaton Place, Suite 340

August 2, 2010 Paul Shriner, EPA Kelly Meadows, Tetra Tech Nuclear uprate schedule As requested, we have examined existing information on uprates at nuclear facilities. As shown in the attached fact sheet from the Nuclear Regulatory Commission (NRC), there are three t ypes of uprate: measurem ent uncertaint y (MU) , stretch (S) and extended

in generating capacity

associated with these uprates are less than 2%, 2 Given these increases in capacity, it is possible that uprates et some or all of the capacity l ost to the energy penalty from cy cle cooling. Table 1 below summarizes the projected uprates in the coming years, as provided by

Table 2 shows a summary of how many

facilities have underta ken each ty pe
Table 1. Scheduled Nuclear Uprates Me asurement Uncertainty Recapture Power Uprates Stretch

Power Uprates Extended

Power Uprates Me gawatts

Thermal 0 0 4 1518 13 0 4 1624 5 1 4 2008 3 0 2 830 1 0 3 1218 22 1 17 7198 Source: NRC fact sheet, February 2008.

Updated data may be periodically posted by the NRC at http://www.nrc.gov/reactors/operating/licensing/power

- uprates.html

. 

### 1 As requested, we have examined existing information on uprates at nuclear facilities. As shown in the attached fact sheet from the Nuclear Regulatory Commission (NRC), there and extended (E)

. in generating capacity

associated with these uprates are less than 2%, 2

- 7% Given these increases in capacity, it is possible that uprates et some or all of the capacity l ost to the energy penalty from
Table 1 below summarizes the projected uprates in the coming years, as provided by ken each ty

pe

Ap proximate Me gawatts Electric 506 541 669 277 406 2399

### 2

Table 2. Summary of Past Nuclear Uprates Category Number of Facilities Percentage of Facilities Av erage % G ain

From U prate Total n uclear facilities in regulated universe 62 Undertaken an uprate of any t yp e 57 91.94% Undertaken an MU uprate 27 43.55% 1.49% Undertaken an S uprate 37 59.68% 4.51% Undertaken an E uprate 14 22.58% 13.40% Source: NRC fact sheet, February 2008.