Meteorological and Meteorological and Oceanographic Monitoring at Oceanographic Monitoring at Diablo Canyon Nuclear Power Diablo Canyon Nuclear Power PlantPlant

John Lindsey

The Diablo Canyon Power located on a fourteen mile stretch of open coastline.

Diablo Canyon Power Plant produces 2.1 Megawatts

The plant uses a high volume of ocean water for cooling.

Each Circulating Water Pump rated at 13,000 horsepower.

1.7 million gallons per minute, or 2.5 billion gallons per day.

Biofouling Control TeamStorm Swell Intake Evaluation

Summary Note: This Evaluation Summary and Worksheet is for guidance only.

 Date: Evaluator:

 

Team Recommendations:

    

 

Plant impact potential: Primary threat to: Screens Condenser

    

Bull Kelp

1. Wind speed.

2. Wind duration.

3. Length of wind fetch.

Maxium Water parttide motion at 25 feet w ith a 15 foot w ave

0

5

10

15

20

25

30

35

5 10 15 20 25Wave period in seconds

Feet

Per

Sec

ond

During periods of extreme swell activity, power plant operations can be challenged.

27.6 MHz Waverider receiver at the DCPP Ocean Lab

S4 Current Meter

Ekman Spiral

November Daily Seawater Temperatures

50

52

54

56

58

60

62

64

66

68

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Date

Tem

per

atu

res

F

2000 Temp

1997 Temp

0

10

20

30

40

50

60

70

Yearly Rain Fall Seawater Temperature

The Diablo Canyon Weather ForecastThe Diablo Canyon Weather Forecast

============= DCPP Weather Forecast for Saturday 05/04/02 ===================

SWELL:

A 3 to 5 feet combined northwesterly sea/swell with a 5 to 9 second period will continue through

tomorrow. Fresh to strong northwesterly winds will generate a 5 to 7 foot combined northwesterly

sea/swell with a 7 to 11 second period on Monday and Tuesday.

Combined with this northwesterly sea/swell will be a 1 to 2 foot southern hemisphere swell

with a 13 to 17 second period through Sunday. Southern hemisphere swell will increase to 2

to 4 with a 14 to 18 second period on Monday and Tuesday.

ATMOSPHERIC CONDITIONS:

Low clouds and fog will develop during the night and morning hours along coastline. Otherwise,

mostly fair weather will continue through Friday.

WINDS:

Moderate to fresh northwesterly winds will continue through Sunday.

Fresh to strong northwesterly winds will develop on Monday and Tuesday.

Northwesterly winds will decrease on Wednesday and Thursday.

Today's winds:

Max sustained wind: NW 23.3 mph (1800)

Max peak winds: NW 24.3 mph (1800)

Yesterday's Winds

Max sustained wind: NW 26.8 mph (1600)

Max peak winds: NW 34.7 mph (1600)

DIABLO CANYON AIR TEMPERATURES:

Yesterday's Today's Tomorrow's

Min Max Min Max Min Max

48.9 F 55.6 F 48.8 F 54.4 F 48.0 F 55.0 F

SEAWATER TEMPERATURES:

Intake seawater temperatures will range between

49 to 51 degrees through Sunday, decreasing to 48

to 50 degrees on Monday through Wednesday.

OCEAN CURRENTS:

A southerly flowing (offshore) current will continue

through Wednesday.

SEAWATER VISIBILITY:

Seawater visibility was 32 feet (top to bottom) at the Diablo

Canyon Intake.

==========================================================================

24-Hour Ocean Condition Outlook for Saturday 05/04 through Sunday 05/05

SEA/SWELL: DIR. NW HT. 3-5 PER. 5-9 morning

Remaining at: DIR. NW HT. 3-5 PER. 5-9 afternoon

Remaining at: DIR. NW HT. 3-5 PER. 5-9 tonight

WINDS: DIR. NW SPEED 10-15 morning

Increasing to: DIR. NW SPEED 20-25 afternoon

Decreasing to: DIR. NW SPEED 5-10 tonight

===========================================================================

48-Hour Ocean Condition Outlook for Sunday 05/05 through Monday 05/06

SEA/SWELL: DIR. NW HT. 3-5 PER. 5-9 Sunday morning

Remaining at: DIR. NW HT. 3-5 PER. 5-9 Sunday afternoon

Remaining at: DIR. NW HT. 3-5 PER. 5-9 Sunday night

WINDS: DIR. NW SPEED 5-10 Sunday morning

Increasing to: DIR. NW SPEED 20-25 + 30 Sunday afternoon

Decreasing to: DIR. NW SPEED 15-20 Sunday night

==========================================================================