. * - a ., O . * . ''':2~ , . ' ' 2 ' i'' " ' ,o T.j ! . Q c Florida Power CO n *O a a T som May 26, 1981 # # 3-051-45 h 9, File: 3-0-3-a-4 e , p Mr. J. P. O'Reilly h 9 fb Director Jun 1 5 g gt ,. -i U.S. Nuclear Regulatory Commission 7, u.s. g T ' [[ Office of Inspection and Enforcement c,', Suite 3100 ' d.p 101 Marietta Street 4 ' O Atlanta, GA 30303 ., X Subject: Crystal River Unit 3 Docket No. 50-302 Oper:1.ing License No. OPR-72 I.E. Bulletin 81-03 FLOW BLOCKAGE OF COOLING WATER TO SAFETY SYSTEM COMPONENTS Bf CORBICULA SP. (ASIATIC CLAM) AND MYTILUS SP. (MUSSEL) . Dear Mr. O'Reilly: . , Enclosed is our response to I.E. Bulletin 81-03. As requested, the manhours expended in responding to this Bulletin was 80 hours. Please contact this office if : au require any additional discussion con- cerning our response. Very truly yours, N P. Y. Baynard ga Manager Nuclear Support Services S Tibbs(F01)D1-3 /[ cc: Director Office of Inspection and Enforcement Division of Reactor Operations Inspection U.S. Nuclear Pagulatory Commission '4ashington, D.C. 20555 | ' e erca 3a733 . ata-eee.stsi 9 3 3 , g7gg gcg 3202 :n ,1,.,ce,in si,ee, seein . , o ec, ,4c42. si m terseurg m . ' . , ,- - . STATE OF FLORIDA COUNTY OF PINEU.AS P. Y. Baynard states that she is the Manager, Nuclear Support Ser- vices of Florida Power Corporation; that she is authorized on the part of said company to sagn and file with the Nuclear Regulatory Comission the information attached hereto; a; f that all such statements made and matters set forth therein are true and correct to the best of her knowledge, information and belief. o "- WL2A,#$ . 3 u N- P. Y. Baynard . Subscribed and sworn to before me, a Notary ,lic in and for the State and County above named, this 26th day of May, 1981. , | - Wb 0 Notary Public i Notary Public, State of Florida at Large, - My Comission Expires: May 29,1984 ! ! Tibbs(R04)D3-3 | | 1 -, . _ _ . , _ . _ _ _ - . _ . _ . _ _ _ _ _ _ . _ . _ _ _ . _ . _ , , . _ _ _ . _ . _ _ _ . _ . _ _ _ _ _ . _ . , . _ _ . , _ _ _ _ ._ . _ _ . '- ., . FPC RESPONSE TO f.E. BULLETlN 81-03 ITEM 1: Determine whether Corbicula sp. or Mytilus sp. is present in the vicinity of the station (local environment) in either the source or receiving water body. If the results of current field monitoring programs provide reasonable evidence that neither of these species is present in the local environment, no further action is necessary except for items 4 and 5 in this section for holders of operating licenses. RESPONSE: The environmental monitoring program, which provides reasonable evidence that neither Corbicula sp. or Mytilus sp. are present in the local environment, is the CR3 ETS Section 3.1.1 Community Structure Study. The program involves quarterly sampling of marine benthos which would indicate these species if they were present. This ongoing study begsn in April 1977. ?,ttached is a cummulative species list of the four years sampling to date (last sample was during December 1980). Neither of the species of concern appear on the list; and therefore, was not found 'in the Crystal River area between April 1977, and December 1980. ITEMS 2 & 3: " Items 2 and 3 are not applicable to CR-3. , ' ITEM 4: l Describe methods either in use or planned (including implementation i date) for preventing and detecting future flow blockage or degrada- l tion due to clams or mussels or shell debris. Include the foll ow- ing information in this description: ITEM 4a: !. | Evaluation of the potential for intrusion of the organisms into l these systems due to low water level and high velocities in the in- ) take structure expected during worst case conditions. 1 RESPONSE: t There are species in the Crystal River area which pose a potential | for fouling of the cooling water system to varying degrees. | Bivalve mollusk species such as 3rachidontes exustus and Cras- | ! sostrea virginica are always present in the intake area, and have | the type of growth form which has potential for causing cooling system fouling. However, these species rarely undergo explosive popul ation increases which are typical of the temoerate Mytilus sp. and the introduced freshwater Corbicula sp. Therefore, we do not expect any significant change In fouling by clams, mussels or their debris. Tibbs(F01)D1-3 _ . _ - - - - .- ._ - - . - - . , ' ' RESPONSE (Cont'd) The minimum water level expected during a Postulated Maximum Hur- ricane would be EL 83'3". Assuming all Nuclear Services and Decay Heat Sea Water Pumps were operating, the average velocity in the intake structure would be .66ft/sec. We do not feel this would have the potential for sweeping a large amount of shell and live mussels into the system. ITEM 4.b: Evaluation of effectiveness of prevention and detection methods used in the past or present or planned for future use. RESPONSE: The Nuclear Service and Decay Heat Closed Cycle Heat Exchangers are currently cleaned on a six (6) week schedule. In between clean- ings, two parameters are monitored as an indication of heat ex- changer performance. The first is on discharge pressure on the raw water pumps. This is used as an indication of backpressure from the heat exchanger. As pressure increases to a certain point, which varfes with the system, the in-service heat exchanger is taken out and cleaned. The other indicator is the temperature differential between inlet seawater and secondary water outlet. If the temperature differen- tial reaches a certain limit, the respective heat exchanger is cleaned. The above method has prov,ed 'vpry effective at CR-3. The Decay Heat Closed Cycle Heat Exchangers stay exceptionally clean. and do not require cleaning beypnd thb six week cycle. The Nuclear Services Heat Exchangers periodically require shooting prior to their six week schedul e, but normally yield only a small amount of dead shell. ITEM 5: Describe the actions taken in items 1 through 3 above and include | the following information: ITEM Sa: Applicable portions of the environmental monitoring program includ- ing last sample date and results. RESPONSE: Answer provided in response to item 1. , ITEMS Sb, c, d & e: | | Items 5b, c, d and e are not applicable to CR-3. | | l j Tibbs(F01)D1-3 - . _ - . .- _ - . - , , . ~ c P00R ORIGINAL. N * *f y Table 1. Taxonomic list and relative occurrence of benthic organisms (excluding organisms found only on oyster reefs), in the vicinity of Florida Power Corporation's Crystal River Plant. (Each relative occurrence datum is the percentage of 20 control samples or 28 discharge samples where occurrence was recorded. A relative occurrence of :ero for both the control and discharge basins indicates species presence in 1977 * * and/or 1978 and/or 1979, but not in 1980. Samples were collected during March, June, September and December 1980.) Relative Occurrence Con trol Discharge Taxon Family Samples Samples PHYLUM ANNELIDA, CIASS POLYCHAETA Amphicteis gunneri Amphar c tidae 25 14 Apoprionosp_i_oi pygmaea Spionidae 0 0 Arabadla it icolor Arabellidae 80 14 Arabella irudescens Arabellidae 0 0 Arenicola cristata Arenicolidae 15 7 Aricides fragilis Paraonidae 0 4 Aricidea philbinae Paraonidae 100 AricI 5a taylori 96 Paraonidae 65 79 , Ar'icid[ sp. Parsonidae 20 29 Axiothella mucosa Maldanidae 90 46 nrgnchicasychis americana Maldanidae 65 21 Brania clavata Syllidae 35 18 2C n,itella capitata Capite111dae 85 71 Ceratonereis irritabilis Nereidae 5 4 Ceratonereis sp. Nereidae 25 7 Chone duneri Sabellidae 85 57 Chone sp. Sabellidae 20 0 , C,i,r r a tulus sp. Cirratulidae 5 0 , Clymene11a torquata Maldanidae 30 39 Dy ybranchus lumbricoides Capitellidae 5 0 ! Diopatra cuprea Onuphidae 40 43 Enoplobranchus sanguineus | Terebellidae 13 4 l Eteone heteropoda Phyllodocidae 60 36 Eumida s_anguinea Phy11odocidae 25 14 | ,Eun i,cc atonnata Eunicidae 5 0 Eu_nic_e pinnata Eunicidae 0 0 ' Fgogone dispar Syllidae 75 21 , Exogone sp. Syllidae 10 0 ! Fabricia sabella Sabellidae 5 7 | Fabricia sp. Sabellidae 85 29 Glycera americana Glyceridae 80 54 Glyceridae Glycera sp. _ 20 0 Cl,ycinde solitaria Goniadidae 0 0 | j Glycinde sp. Goniadidae 35 7 Gyptis brevinaloa Resionidae 70 39 Haploscoloplos foliosus. Orbiniidae 15 21 . ! I-20 . - _ - . Table 1. (Con t. ) n . i.) Relative Occurrence Control Discharge Taxon Pamily Samples Samples . Hanloscoloolos robustus Orbiniidae 50 32 Haploscoloplos sp. Orbiniidae 35 32 Harmothoe aculeata Polynoidae 15 7 Harmothoc sp. Polynoidae 0 0 He_teromastus filiformis Capitellidae 75 64 Ilyboscolex longiseta Scalibregidae 0 0 Laconereis culveri Nereidae 65 100 Lepidametria commensalis Polynoidae 40 4 Lepidonotus sp. Polynoidae 25 0 Loandalia f,a_uveli Pilargidae 0 0 _ Loimia viridi; Terebellidae 0 0 Lumbrineris sp. Lumbrinereidae 50 57 Lysidice ninetta Eunicidae 30 25 Lysilla' alba Terebellidae 60 39 Magelona pettiboneae Magelonidae 35 64 Magelona sp. Magelonidae 5 4 Malacoceras vanderhorsti Spionidae 0 4 gg Malacoceras sp. Spionidae 0 0 Marghy,sa sanguinea Eunicidae 70 61 Mglianastus cal _if orniensis Capitellidae 80 79 * i|elinna maculata Ampharetidae 5 13 Minuspio cirrifers Spionidae 10 11 ,_Minuspio cirrobranchiata Spionidae 15 0 Minuspio sp. Spionidae 15 4 Nainereis sp. Orbiniidae 60 13 Nematonereis unicornis Eunicidae 5 14 Nereis acuminata Nereidae 25 11 Nereis falsa Nereidae 25 36 Nereis succipea Nereidae 50 63 Nereis sp. Nereidae 70 36 Notomastus latericeus Capitellidae 0 11 Notomastus sp. Capitellidae 0 0 Odontocyll'is sp. Syllidae 15 4 Onuphis nebulosa , Onuphidae 90 39 | 6phiodromus sp. Hesionidae 5 4 Owenia fusiformis Oweniidae 20 25 Parahesione luteola Hesionidae 5 0 Paramastis nocciosa Capi te llidae 0 0 Paransitis speciosa Phyllodocidae 10 4 Paraonides sp.