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Category:E-Mail
MONTHYEARML23334A0912023-11-30030 November 2023 NRR E-mail Capture - Diablo Canyon 1 and 2 - Audit Questions for License Amendment Associated with TSTF-505, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b ML23335A1012023-11-0606 November 2023 OEDO-23-00350-NRR - Screen-in Email - 10 CFR 2.206 Petition from Mother'S for Peace and Change.Org Regarding Diablo Canyon ML23306A0422023-11-0202 November 2023 NRR E-mail Capture - Acceptance Review Diablo Canyon Request to Adopt 10 CFR 50.69, risk-informed Categorization and Treatment of SSCs ML23230A0702023-08-18018 August 2023 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request to Revise Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times RITSTF Initiative 4b ML23165A2702023-06-14014 June 2023 NRR E-mail Capture - Acceptance Review - Diablo Canyon Revision to the Unit 1 Reactor Vessel Material Surveillance Program Withdrawal Schedule ML23157A2392023-06-0505 June 2023 Limited Appearance Statement from Nina Babiarz in the Matter of the Diablo Canyon ISFSI License Renewal Application ML23096A1792023-04-0606 April 2023 NRR E-mail Capture - Request for Additional Information Diablo Canyon Exemption Request Regarding Senior Reactor Operator License Application ML23094A1032023-04-0404 April 2023 NRR E-mail Capture - Acceptance Review - Diablo Canyon Exemption Request Regarding Senior Reactor Operator License Application ML23076A0932023-03-16016 March 2023 16-2023 Email - Estimate of Spent Nuclear Fuel in Tons ML23067A0202023-03-0808 March 2023 NRR E-mail Capture - Diablo Canyon Nuclear Power Plant Evacuation Time Estimate Analysis Review ML23046A1132023-02-13013 February 2023 Transmittal Email, Paul Bessette to Gibson, 2/13/23, Filing of Formal Opposition to PG&E Exemption Request ML23046A1042023-02-13013 February 2023 Transmittal Email, Diane Curran to Gibson, 2/13/23, Filing of Formal Opposition to PG&E Exemption Request ML23052A2042023-01-10010 January 2023 E-mail from Paul Bessette Dated 01/10/2023 Regarding Diablo Canyon ML22326A1632022-11-21021 November 2022 Licensee Comment Email on Post-Shutdown Emergency Plan Amendment ML22266A0012022-09-22022 September 2022 (External Sender) E-Mail Diablo Canyon Power Plant, Unit Nos. 1 and 2 - Total Amount of Spent Nuclear Fuel Stored in Tons ML22241A1142022-08-29029 August 2022 NRR E-mail Capture - Acceptance Review - Diablo Canyon Application to Revise Technical Specifications to Adopt TSTF-569, Revision of Response Time Testing Definitions ML22194A8872022-07-11011 July 2022 September 2022 Emergency Preparedness Exercise Inspection - Request for Information Email ML22187A2652022-07-0606 July 2022 NRR E-mail Capture - Request for Additional Information: Diablo Canyon Exemption Request for Part 73 force-on-force Training Due to COVID-19 ML22105A0702022-04-15015 April 2022 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request to Revise Technical Specifications to Adopt TSTF 577, Revised Frequencies for Steam Generator Tube Inspections ML22090A0832022-03-31031 March 2022 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request for Approval of a Certified Fuel Handler Training and Retraining Program ML22089A1672022-03-29029 March 2022 Email - Acknowledgement of NRC Receipt of Diablo Canyon ISFSI Renewal Application ML22087A0412022-03-25025 March 2022 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request for Approval of Alternative Security Measures for Early Warning System ML22061A2192022-03-0202 March 2022 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Proposed Changes to Emergency Plan for post-shutdown and Permanently Defueled Condition ML21323A0652021-11-19019 November 2021 NRR E-mail Capture - Acceptance Review - Diablo Canyon Revision of Emergency Plan for post-shutdown Condition ML21264A6722021-09-21021 September 2021 NRR E-mail Capture - Revised Schedule: Diablo Canyon Request to Revise Technical Specification to Reflect the Permanent Cessation of Reactor Operation ML21215A3432021-08-0303 August 2021 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Request to Revise Technical Specification 3.8.1, AC Sources - Operating to Support Diesel Fuel Oil Transfer System Component Planned Maintenance ML21189A0462021-07-0707 July 2021 NRR E-mail Capture - Draft Request for Additional Information - Diablo Canyon Emergency Amendment Request to Revise Technical Specification 3.7.8, Auxiliary Saltwater (Asw) System ML21188A0382021-07-0707 July 2021 (External_Sender) DCPP Draft Emergency LAR - Asw DCL-21-046, Email for Emergency LAR for TS 3.7.8, Auxiliary Saltwater (Asw) System2021-07-0707 July 2021 Email for Emergency LAR for TS 3.7.8, Auxiliary Saltwater (Asw) System ML21189A0662021-07-0707 July 2021 NRR E-mail Capture - Additional Draft Request for Additional Information - Diablo Canyon Emergency Amendment Request to Revise Technical Specification 3.7.8, Auxiliary Saltwater (Asw) System ML21189A0442021-07-0707 July 2021 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Emergency Amendment Request to Revise Technical Specification 3.7.8, Auxiliary Saltwater (Asw) System ML21124A0612021-05-0404 May 2021 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request to Revise Technical Specification 3.8.1, AC Sources - Operating to Support Diesel Fuel Oil Transfer System Component Planned Maintenance ML21104A3642021-04-14014 April 2021 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Proposed Technical Specifications and Revised License Conditions for the Permanently Defueled Condition ML21062A0642021-03-0202 March 2021 NRR E-mail Capture - Request for Additional Information for Diablo Canyon Generic Letter 2004-02 Submittal (L-2017-LRC-0000) ML21054A3112021-02-23023 February 2021 NRR E-mail Capture - Acceptance Review: Diablo Canyon Request for One-Time Exemption from Select 10 CFR 55.59 Requirements ML21012A4432021-01-12012 January 2021 NRR E-mail Capture - Acceptance Review - Diablo Canyon Request to Revise Technical Specification to Reflect the Permanent Cessation of Reactor Operation ML20328A3002020-11-23023 November 2020 Email from Cgnp to the NRC - Comment Diablo Canyon Nuclear Power Plant, Units 1 and 2 - Dcdep Public Meeting - November 24, 2020 ML20329A0692020-11-23023 November 2020 NRR E-mail Capture - Request for Additional Information: Diablo Canyon COVID-19 Exemption Request to Extend force-on-force Exercise ML20323A4532020-11-18018 November 2020 NRR E-mail Capture - Request for Additional Information: Diablo Canyon COVID-19 Exemption Request to Extend Firearms Requalification ML20261H4232020-09-17017 September 2020 NRR E-mail Capture - Request for Additional Information: Diablo Canyon Unit 2 Fall 2019 Steam Generator Tube Inspection Report ML20239A9492020-08-26026 August 2020 (External Sender) E-Mail Comment by D. Lochbaum Regarding Diablo Canyon Unit 1 AFW System Piping ML20239A7282020-08-24024 August 2020 (External-Sender) E-mail Comments on No Significant Hazards Determination for Diablo Canyon LAR ML20239A7752020-08-24024 August 2020 (External-Sender) E-mail Comments on No Significant Hazards Determination for Diablo Canyon LAR ML20240A2302020-08-23023 August 2020 (External-Sender) E-mail Public Comment by D. Lochbaum Regarding Diablo Canyon Safety Issue ML20234A2422020-08-20020 August 2020 NRR E-mail Capture - Diablo Canyon Additional Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G EPID: L-2020-LLA-017 ML20233A8592020-08-19019 August 2020 Mothers for Peace Public Comment on Exigent LAR to Modify TS 3.7.5, Auxiliary Feedwater System ML20233A3222020-08-18018 August 2020 Comment (4) e-mail from D. Lochbaum Regarding Diablo Canyon Exigent LAR ML20231A2372020-08-17017 August 2020 NRR E-mail Capture - Diablo Canyon Additional Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G EPID: L-2020-LLA-017 ML20232C6482020-08-17017 August 2020 Lochbaum Public Comment 1 on Exigent LAR to Modify TS 3.7.5, Auxiliary Feedwater System ML20230A0732020-08-14014 August 2020 NRR E-mail Capture - Diablo Canyon Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G 2023-08-18
[Table view] Category:General FR Notice Comment Letter
MONTHYEARML24029A2902024-01-29029 January 2024 Comment (3) E-mail Regarding Diablo Canyon Lr EIS Scoping ML24025A1542024-01-25025 January 2024 Comment (2) E-mail Regarding Diablo Canyon Lr EIS Scoping ML24025A1402024-01-24024 January 2024 Comment (1) E-mail Regarding Diablo Canyon Lr EIS Scoping ML22228A1642022-08-15015 August 2022 Comment (5) of Cindy Marie Absey, Neil Havlik & Kim Murry on Behalf of League of Women Voters of San Luis Obispo County, Pacific Gas and Electric Company; Diablo Canyon Nuclear Power Plant, Units 1 and 2; Post-Shutdown Decommissioning Activ ML22203A0462022-07-21021 July 2022 Comment (3) of Californians for Green Nuclear Power, Inc., on Pacific Gas and Electric Company; Diablo Canyon Nuclear Power Plant, Units 1 and 2; Post-Shutdown Decommissioning Activities Report ML22203A0452022-07-21021 July 2022 Comment (2) of Jane Swanson on Behalf of San Luis Obispo Mothers for Peace on Pacific Gas and Electric Company; Diablo Canyon Nuclear Power Plant, Units 1 and 2; Post-Shutdown Decommissioning Activities Report ML22202A4242022-07-19019 July 2022 Comment (1) of Anonymous on Pacific Gas and Electric Company; Diablo Canyon Nuclear Power Plant, Units 1 and 2; Post-Shutdown Decommissioning Activities Report ML15275A2152015-09-30030 September 2015 Comment (40) of Bruce Campbell on Helium Finding Adds New Wrinkle to Newport-Inglewood Fault ML15275A2132015-09-30030 September 2015 Comment (38) of Mary Ivora on Environmental Benefits of Diablo Canyon Nuclear Plant ML15275A2292015-09-30030 September 2015 Comment (31) Regarding Civilian Nuclear Power ML15275A2282015-09-30030 September 2015 Comment (30) of Unknown Individual Opposing Diablo Canyon Units 1 and 2 ML15275A2302015-09-30030 September 2015 Comment (32) of Joe Ivora Supporting the Relicensing of Diablo Canyon ML15275A2342015-09-30030 September 2015 Comment (36) of Elizabeth Brousse on Behalf of Mothers for Peace on the License Renewal of Diablo Canyon Nuclear Plant ML15275A2312015-09-30030 September 2015 Comment (33) of Debby Nicklas, on Behalf of French Hospital Medical Center, Supporting the License Renewal and Ongoing Operations of PG&E ML15282A3002015-09-0101 September 2015 Comment (45) of Allen Myers Opposing the Diablo Canyon Nuclear Plant License Renewal ML15289A3742015-09-0101 September 2015 Comment (84) of Gene Nelson of Californians for Green Nuclear Power Supporting Renewal of the License Application for Diablo Canyon Power Plant ML15292A5462015-09-0101 September 2015 Comment (103) of Becky Ota and Craig Shuman, on Behalf of California Department of Fish and Wildlife, on Notice of Intent to Reinitiate the Environmental Scoping Process for the Review of the Diablo Canyon Power Plant License Renewal ML15287A4362015-09-0101 September 2015 Comment (71) of Gene Nelson Opposing the Diablo Canyon Nuclear Plant, Units 1 and 2, Notice of Intent to Prepare an Environmental Impact ML15282A2982015-09-0101 September 2015 Comment (43) of Minea Herwitz Opposing the Diablo Canyon Nuclear Plant License Renewal ML15258A3472015-09-0101 September 2015 Comment (29) of Craig Shuman on Behalf of the State of CA - Natural Resources Agency, Regarding Notice of Intent to Reinitiate the Environmental Scoping Process for the Review of the Diablo Canyon Power Plant, Units 1 and 2 ML15282A3042015-09-0101 September 2015 Comment (49) of David Traub Opposing the Diablo Canyon Nuclear Plant License Renewal ML15282A3032015-09-0101 September 2015 Comment (48) of Anonymous Opposing the Diablo Canyon Nuclear Plant License Renewal ML15292A5452015-09-0101 September 2015 Comment (102) of Bruce Campbell on Deis in Regards to Diablo Canyon Facility License Extension ML15292A2362015-08-31031 August 2015 Comment (92) of Oliver Mellan on Application for Renewal of Diablo Canyon Nuclear Power Plant License ML15292A2352015-08-31031 August 2015 Comment (91) of Alexander Cannara on Diablo Canyon Nuclear Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15292A2372015-08-31031 August 2015 Comment (93) of Bob Greene on Diablo Canyon Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15292A2382015-08-31031 August 2015 Comment (88) of Meagan Wilson on Diablo Canyon Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15292A2392015-08-31031 August 2015 Comment (89) of Mike Kirkwood on Behalf of Economic Alliance of Northern Santa Barbara County on Application for Renewal of Diablo Canyon Nuclear Power Plant License ML15292A2402015-08-31031 August 2015 Comment (90) of Oliver Mellan on Application for Renewal of Diablo Canyon Nuclear Power Plant License ML15292A3392015-08-31031 August 2015 Comment (94) of Sarah Risley, Heather Tarango, Shilo Terek, Megan Wilson, and Kristin Zaitz Supporting Diablo Canyon Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15292A3402015-08-31031 August 2015 Comment (95) of Madeline Cimone on Diablo Canyon Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15292A3412015-08-31031 August 2015 Comment (96) of Daryl Gale Opposing Diablo Canyon Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15292A3892015-08-31031 August 2015 Comment (97) of Anthony Allen Bisset Opposing on the Renewal of Diablo Canyon Nuclear Power Plant, Units 1 and 2 License; Notice of Intent to Prepare an Environmental Impact Statement ML15292A3902015-08-31031 August 2015 Comment (98) of Joseph Ivora on Diablo Canyon Power Plant, Units 1 and 2; License Renewal ML15258A3452015-08-31031 August 2015 Comment (28) of Ann Mcpherson, on Behalf of Us EPA, on Notice of Intent to Prepare an Environmental Impact Statement for the Proposed Operating License Renewal for Diablo Canyon Power Plant Units 1 and 2, San Luis Obispo County, California ML15292A3912015-08-31031 August 2015 Comment (99) of Nina Beety, on Behalf of Smart Meter Harm, Opposing Diablo Canyon Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15292A3922015-08-31031 August 2015 Comment (100) of Margaret Smith on Diablo Canyon Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15292A5442015-08-31031 August 2015 Comment (101) of Antoinette Stein on Diablo Canyon Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15289A4052015-08-31031 August 2015 Comment (82) of Anthony Armini on Diablo Canyon Power Plant, Units 1 and 2; License Renewal ML15289A4032015-08-31031 August 2015 Comment (81) of William P Gloege on Diablo Canyon Power Plant, Units 1 and 2; License Renewal ML15289A3132015-08-31031 August 2015 Comment (83) of Gene Nelson Opposing the Diablo Canyon Nuclear Plant, Units 1 and 2, Notice of Intent to Prepare an Environmental Impact Statement ML15289A3142015-08-31031 August 2015 Comment (85) of Lmh Anonymous Opposing the Diablo Canyon Nuclear Plant, Units 1 and 2, Notice of Intent to Prepare an Environmental Impact Statement ML15289A3152015-08-31031 August 2015 Comment (86) from Anonymous Opposing Diablo Canyon Power Plant, Units 1 and 2; Notice of Intent to Prepare an Environmental Impact Statement ML15289A3162015-08-31031 August 2015 Comment (87) of Steve Mcgrath Opposing the Diablo Canyon Nuclear Plant, Units 1 and 2, Notice of Intent to Prepare an Environmental Impact Statement ML15289A3982015-08-30030 August 2015 Comment (76) William P. Gloege of Supporting Re-Licensing of the Diablo Canyon Power Plant ML15289A4022015-08-30030 August 2015 Comment (80) of Jerry Brown on Behalf of World Business Academy on Diablo Canyon Power Plant, Units 1 and 2; License Renewal ML15289A4012015-08-30030 August 2015 Comment (79) of Kirk Gothier on Diablo Canyon Power Plant, Units 1 and 2; License Renewal ML15289A4002015-08-30030 August 2015 Comment (78) of Gene Nelson on Diablo Canyon Power Plant, Units 1 and 2; License Renewal ML15289A3992015-08-30030 August 2015 Comment (77) of Gene Nelson on Diablo Canyon Power Plant, Units 1 and 2, License Renewal ML15289A3972015-08-30030 August 2015 Comment (75) of Jane Swanson on Diablo Canyon Power Plant, Units 1 and 2; License Renewal 2024-01-29
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Mend jola, DorisFrom:Sent:To:
Subject:
Attachments:
john stephens
<stephens2@earthlink.net>
Monday, August 24, 2015 6:55 PMWentzel, Michael[External_Sender]
Environmental affects of Diablo CanyoWHY DIABLO Canyon 's ONCE THROUGH COOLING SYSTEM SHOULDBE CONSIDERED.docx Hello Michael.
I'm attaching the statement that I would have liked to present at the August 5thmeeting, but ,of coarse, couldn't in 3 minutes.
I srudied once through cooling at the power plantin Redondo beach, from 1974 through 1996 and this work has continued to the present5.
Iknow of no better data concerning the affects of once through cooling on a fish assemblage than our 41 year study. See Attachment.
John Stephens, Emeritus professor, Occidental college.......
- LJ..... 7"ICC:)2,w,,~SUNSI Review CompleteTemplate
= ADM -013E-RIDS= ADM -03Add= 1i" 1 WHY DIABLO CANYON'S ONCE THROUGH COOLING SYSTEM SHOULDBE CONSIDERED "STATE OF THE ART"I am a marine biologist (an ichthyologist) retired ( 1996) after 38 yearsof teaching and research.
During that time, I spent more than 20 yearsexamining the affects of once through cooling at the Redondo Beach(King Harbor) steam electric generating
- facility, on the adjacent fishassemblage affected by the intake and hot water discharge.
Bothtemperature change and entrapment/entrainment were examined.
Inthis study, we monitored monthly the volume of plankton and numberby species of fish larvae in the adjacent water column. We examined therecruitment of larval fishes to the adjacent rocky reefs and theabundance of juvenile,
- subadult, and adult fishes by quarterly divercounts on 5-7 transect areas. At the same time we monitored the fishassemblage in a kelp bed site, three miles to the south at Palos Verdes,with transects taken at the same depths as those in King harbor. Weconsidered this site, as a control comparison.
Additionally, we followedthe fish entrapment for a number of years, including entrapment duringheat treatments.
We also examined the affects of chlorination on someof these species.
This field study is still going on (41st year) carried outby my replacement and has produce more than twenty papers. I havelisted a number of these papers for your interest at the end of thisstatement.
In general, the fish assemblage surrounding the once throughcooling system has remained abundant and diverse, when compared tothat of the Palos Verdes kelp bed which is considered an important natural habitat, and the larval entrainment doesn't appear to have aneffect on the fishes of the assemblage.
This, though the assemblage haschanged due to the transition from a cold PDO to a warm one, as well asdue to El Nino events, habitat destruction from storms, and breakwater modification, etc.I have not been a strong supporter on nuclear power plantsthough I helped develop the fish return system that functioned atSONGS unit 2 before it was shut down. I am a fan of adequate electrical power and not of carbon producing hydrocarbon plants. The U. S.electrical grid is not ready to loose California's last functioning nuclearplant, which produces abundant carbon free energy. Coastal powerplants do kill many fish larvae and a limited number of entrapped fishesbut we see no evidence of an effect upon th.e local fish assemblage.
The once through cooling system at Diablo is unique, I believe forCalifornia.
Both the intake and the discharge are in the intertidal zone,not in the subtidal.
A large number of intertidal fishes are small benthicspecies, rarely swimming in the water column and thus not subject toentrapment.
Entrapment of fishes generally occurs at night when afishes rheotactic sense is marginal and entrapped fish are largely activeschooling nocturnal species.
(Queenfish, white croakers,,
anchovies etc).Further, the entrance to the intake was designed for three units andonly two were built so that the opening is relatively large and thusproduces a slower incurrent.
Unfortunately, I know of no dataconcerning entrapment of fishes at Diablo or any study of entrapment atthis site. However, entrapment, even in large subtidal intakes is rarelyconsidered significant as opposed to the affects of recreational andcommercial fishing.
At King Harbor, thee daily entrapment was muchless than the take by any active fishing vessel. Entrainment of planktonand larvae does kill lots of larval fishes and planktonic organisms.
I haveexamined the larval fish data taken by Tenera in over ten years of meternet samples near the intake. Eleven of the top 20 larvae entrained areintertidal species.
Of the 9 remaining, anchovies, white croakers andone species group of rockfish rank in the top group, anchovy larvae areabundant in most coastal inshore waters (including my work atRedondo beach), though they are more abundant during cold PDO's.Almost all of the top twenty species show considerable annualfluctuation with no obvious trend. Further, most oceanic or subtidalspecies of larvae that are taken in the intertidal would be unlikely tosurvive their settlement into this shallow highly competitive environment.
Remember that fishes produce huge numbers of larvae,often greater than 1,000,O00eggs/female because >99% will not survivepredation, random drift or starvation.
(which is the evolutionary pressure for production of so many). The loss to intakes has not beenfound to be significant.
In order to document such an effect, assemblage populations would have to be shown to be declining due to lack ofrecruitment caused by power plant entrainment.
All fish populations have large annual fluctuations and it is highly unlikely that any of thesefluctuations could be ascribed to entrainment as fish larvae on thePacific coast rarely return to their parental population.
Suggested, nohard data has shown even a short term affect. A recent report to theCalifornia Energy Commission on the King harbor Ichthyoplankton (2008) shows that if the data is plotted from 1974 to 2008, there has been a "steady "decrease in plankton abundance, yet no correlation between entrainment and this decline was discovered.
The majordecrease occurred in the late 19 70's when the cool PDO ended. If weignore the cool PDO data, the overall decrease disappears.
No increasehas been seen since the plant went largely offline in around 2010.There has never been any long term effect demonstrated for aPacific coast fish species from open coastal larval entrainment.
Thegeological and oceanographic conditions in the eastern Pacific can notbe compared to those of the Western Atlantic where the fishpopulations are often dependent on large embayments (sunken rivermouths) for some stage in the life history and required annualmigrations which increase vulnerability to entrapment or entrainment.
Even there, marine entrainment has not been shown to be a long termproblem.Hot water discharge is benign for most local mobile fish specieswhich simply move to appropriate thermal conditions..
As a biologist, the thought of a discharge through the intertidal, a wonderfully richbiological
- habitat, seemed insane. I observed it while lecturing to theplant scientists on fish thermal preference prior to the plants initialoperation.
Such a flow would certainly drive off motile organisms, including fish, and kill sedentary flora and fauna. Fishes driven fromtheir preferred habitat are certainly more vulnerable to predation.
Withthe initial start up of the plant, this happened.
- However, only arelatively small area of intertidal is strongly affected and even the worstimpinged areas have been recolonized by tolerant species.
When theplant is closed, this change should be reversed in several years. Fishesdetect water temperature and avoid those that are harmful.
The warmwater rises quickly to the surface as the water deepens and is rapidlycooled, though the shallow discharge cove has certainly beensignificantly warmed. Some fishes that normally are known to becommon south of Point Conception have taken advantage of this smallarea and live here happily.
Many fish larvae from the warmer southernCalifornia environment drift north of the Point Conception faunalbarrier, but few are able to survive or reproduce here. The Diablowarmer temperatures may be a harbinger of what will occur as seawater temperatures rise with global warming.
What exists here today,due to once through cooling at Diablo is likely to be more prevalent inthe future. Again, at King Harbor in Southern California, a number oftropical species have been observed living in the warm discharge water including broomtail
- groupers, and the Cortez Chub. This appears tohave little effect upon the indigenous species and they usually disappear after an unusually cold winter.The once through cooling system at Diablo does not show anegative affect on the local fish species and because of its' intertidal intake and discharge is highly unlikely to in the future. Any change dueto water warming should rapidly disappear once the plant is taken offline and conditions return to the then current status. Compared to theterrestrial effect of cooling towers, which also would require water forcooling, and could produce local weather changes, the present oncethrough cooling system is the system of preference.
Literature of interst by Date..Terry, C. B. and J. S. Stephens, Jr. 1976. A study of the orientation of selected embiotocid fishes to depth and shifting vertical temperature gradients Bull S. California Acad Sci75>170-183.
- Stephens, J. S. Jr and K. Zerba 1981. Factors affecting fish diversity on a temperate reef. Environmental Biol. Fishes 6:111-12 1.Shrode, J. B., K. Zerba, and J. SA. Stephens Jr 1982. Ecological significance oftemperature tolerance and preference in some inshore California species.
Amer.Fish. Soc. 11" 1:45-5 1.Shrode, J. B., L. P. Purcell, amnd J. S. Stephens Jr. 1983. Ontogeny of thermalpreference in four species of viviparous fishes (Embiotocidae).
EWnvir. Biol. Fish.9:71-76.Stephens, J. S. Jr., P. A Morris, K. Zerba, andM. S. Love 1984. Factors affecting fishdiversity on a temperate reeflI: the fish assemblage at Palos verdes Kpoint, 1974-1981. Envir. Biol. Fish. 11:259-275.
- Stephens, J. S. Jr, G. Jordan, P0. A. Morris,M.M.
Singer, and G. McGowen 1986. Can werelate larval fish abundance to recruitment or population stability?
A preliminary analysis of recruitment to a temperate rocky reef. CalCOFI 27: 67-83.Stephens, J. S. Jr., J. E. Hose, and M. S. Love 1988. Fish assemblages as indicators ofenvironmental change in nearshore environments.
In Soule and Kleppel eds.Maroine oragnisms as indicators.
Chap. 5:91-1054.
Springer-Verllag Hollbrook, S.J., M. J. Kingsford, R. J. Schmitt, and J. S. Stephens Jr. 1994. Spatial andtemporal patterns in assemblages of temperate reef fishes. Amzer. Zool. 34:4563-475.Pondella, D. J. and J. S. Stephens Jr. 1994. Factors affecting the anbunfance ofjuvenile fish specieson a temperate artificial reef. Bull. Mar. Sci 55:1216-1223.
Hollbrook, S. J., Schmitt, and J. S. Stephens 1997. Ecological Applications 7(4) 1997:1299-13 10.Bond, A. B., J. S. Stephens Jr., D. J. Pondella, M. J. Allen, and M. Helvey 1999. A methodfor estimating marine habitat valuesbased on fish guilds, with a comparison between sites in Southern California.
Bull. Mar. Sci. 64(2); 219-2432.
- Stephens, J. S. Jr., and D. J. Pondella I1 2002. Larval productivity on a matureartificial reef.- the ichthyoplankton of King Harbor, CA. OICES Jo. Mar. 8ci.59:51-58.
- Stephens, J. S. Jr., R. J. Larson, and D. J. Pondella II. (2006) Rocky reefs and kelp beds,Chapter 9: 227252 pp-in Allen, L. G., D. P. Pondella II, and M. H. Horn.eds (2006),The ecology of Marine fishes, California and adjacent waters U. C. Ptress: 660;pp.M.H.Horn and J. S. Stephens, Jr. (2006) Climate change and overexploitation, Chapter 25 :621-635 in Allen, L. G., D. J. Pondella, and M. H. Horn ibid.Pondella, D. J., J. P. Williams, and E. F. Miller (2008) The ichthyoplaNKTON OF KINGHAKRBOR, REDONDO BEACH, CALIFORNIA 1974-2008.
PIERT FINAL RPT.TO THECALIFONRIA John S. Stephens, Jr. PhD James Irvine Professor of Environmental Biology Emeritusand founder, Director
- Emeritus, Vantuna Research Group, Occidental
- College, LosAngeles.
Present address Arroyo Grande, Ca. 93420