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Palo Verde Sets Production Record

  Palo Verde Sets Production Record

           Plant Operator APS Highlights Other 2012 Accomplishments

Business Wire

PHOENIX -- February 25, 2013

Palo Verde Nuclear Generating Station achieved its 21^st consecutive year in
2012 as the nation’s largest power producer. The 31.9 million megawatt-hours
of net production is the most ever generated by Palo Verde or by any other
U.S. power station of any kind. Palo Verde is the only U.S. generating
facility to ever produce more than 30 million megawatt-hours in a year – an
operation accomplishment the plant has achieved eight times.

Palo Verde Nuclear Generating Station's three 1,340-megawatt (net) generating
units are on an 18-mon ...

Palo Verde Nuclear Generating Station's three 1,340-megawatt (net) generating
units are on an 18-month refueling cycle, with two refueling outages scheduled
each year - one in the spring and another in the fall. Palo Verde is operated
by Arizona Public Service (APS). (Photo: Business Wire)

According to industry data, Unit 1 produced more electricity in 2012 than any
other reactor in the U.S. and was the third most productive in the world.
Despite a scheduled refueling outage in fall 2012, Unit 2 was the third most
productive reactor in the U.S. and ranked ninth in the world. Unit 3, which
completed a scheduled refueling outage in spring 2012, ranked sixth in the
U.S. and 17^th in the world. Palo Verde’s three reactors are part of 104
operating units in the U.S. and 437 in the world.

“For the third consecutive year, the plant has increased production resulting
from efficient refueling outages, planned maintenance and upgraded equipment,”
said Randy Edington, Executive Vice President and Chief Nuclear Officer for
Arizona Public Service Co., the operator and largest owner of Palo Verde. “The
efforts of our highly skilled employees and the installation of new steam
generators, high efficiency low-pressure turbine rotors, new reactor vessel
heads and rapid refueling machines have resulted in increased output and
decreased time for planned activities that keeps the plant off-line.”

Other 2012 accomplishments include:

  *Test success. All 27 members of Palo Verde’s class of reactor operator and
    senior reactor operator trainees passed the Nuclear Regulatory Commission
    exam in 2012. The class was the largest in the industry with a 100 percent
    passing rate. The licensing exam culminates 18 months of rigorous
    classroom, simulator and on-the-job training. The exam consists of both an
    operating portion and written portion.
  *Outstanding continuous operation. Unit 2 recorded the best performance in
    plant history with 518 consecutive days on line, ending October 5, 2012.
    The previous Palo Verde record for consecutive days on line (also held by
    Unit 2) was 515, completed in 1999. Unit 1 and 3’s longest consecutive
    runs are 502 and 509 days, respectively.

  *Low radiation exposure. Unit 2 surpassed arecord for lowest outage
    radiation exposure in the nuclear industry. Palo Verde’s Unit 2 refueling
    outage completed in November recorded the lowest ever at 19 rem, besting
    the record set by Palo Verde Unit 1 in 2011 at 20 rem.

    In addition, the collective radiation dose for workers at Palo Verde was
    the lowest in the facility’s history and a record for the U.S. commercial
    nuclear energy industry.

    Rem is an abbreviation for roentgen equivalent man, a measurement of
    ionizing radiation. One rem is equivalent to receiving one upper
    gastrointestinal (GI) computerized tomography (CT) scan.

“We will continue to improve our performance and stay on course to achieve our
mission to ‘SAFELY’ and efficiently generate electricity for the long term,’”
Edington concluded.

Palo Verde is the largest nuclear power station in the nation. Its three units
can generate more than 4 million kilowatts of safe, clean, reliable, low-cost
electricity every hour – enough to serve about 4 million people.

In addition to the energy produced, Palo Verde has an estimated annual
economic impact of $1.8 billion in Arizona through taxes, salaries, purchases
of materials and services, and more.

Palo Verde is operated by APS and jointly owned by APS, Salt River Project,
Southern California Edison Co., El Paso Electric Co., Public Service Co. of
New Mexico, Southern California Public Power Authority and the Los Angeles
Department of Water & Power.

APS, Arizona’s largest and longest-serving electricity utility, serves more
than 1.1 million customers in 11 of the state’s 15 counties. With headquarters
in Phoenix, APS is the principal subsidiary of Pinnacle West Capital Corp.
(NYSE: PNW).

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Contact:

Arizona Public Service Co.
Betty Dayyo, 602-250-2309
cell: 602-390-0958
aps.com/newsroom