ML20093L022

Proposed Tech Spec Replacement Page 3/4 8-2, Electrical Power Sys, Deleting Cable Tunnel Sump Pump Surveillance Requirement Re Ac Sources

ML20093L022
Person / Time
Site:	Crystal River
Issue date:	07/25/1984
From:	FLORIDA POWER CORP.
To:
Shared Package
ML20093L004	List: 3F0784-17, Application for Amend to License DPR-72,consisting of Tech Spec Change Request 123,deleting Cable Tunnel Sump Pump Surveillance Requirement Re Ac Sources.Fee,Certificate of Svc & NSHC Determination Encl ML20093L022
References
NUDOCS 8407310272
Download: ML20093L022 (6)

Text

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ELECTRICAL POWER SYSTEMS ACTION (Continued)

c. With two of the above required off-site A.C. circuits inoperable, demonstrate the OPERABILITY of two diesel generators by performing Surveillance Requirement 4.8.1.1.2.a.4 within one hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter, unless the diesel generators are already operating; restore at least one of the inoperable off-site sources to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. With only one off-site source restored, restore at least two off-site circuits to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of initial loss or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

d. With two of the above required diesel generators inoperable, demonstrate the OPERABILITY of two off-site A.C. circuits by performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereaf ter; restore at least one of the inoperable diesel generators to OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Restore at least two diesel generators to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of initial loss or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each independent circuit between the off-site transmission network and the on-site Class IE distribution system shall be:

a. Determined OPERABLE at least once pe. 7 days by verifying correct breaker alignments and indicated power availability,

b. Demenstrated OPERABLE at least once per 18 months during shutdown by transferrring unit power supply from the normal circuit to the alternate circuit.

CRYSTAL RIVER - UNIT 3 3/48-2 B407310272 840725 PDR ADOCK 05000302 P PDR

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Harch 9, 1981 Florida Power Corporation P.O. Box 14042 St. Petersburg, FL 33733 ATTENTION: S.F. ULM, PROJECT ENGINEER Desr Sir:

SUBJECT:

CRYSTAL RIVER UNIT #3 SUBSTATION CABLE REF: FPC LETTER OF JANUARY 19, 1981 Relative to your question about continuous submersion in water, we respectively state the following: -

Based on our extensive experience with regular Kerite insulation, upon which Kerite FR insulation is compared, that the condition described will not in any way adversely affect the ca bl es' pe rf ormance .

The following point is made, that salt water submersion is less severe than submersion in pure water.

Enclosed is Eh205 that forms the basis for our conclusion.

Yours truly, THE KERITE COMPANY From the office of: E. N. Sleight Assistant Vice President National Genera i n Signee: Norma H. Dube -

Administrator, Power Plant Generation '

NHD:ss EncIosure a subsidiary of HARVEY HuBBELL INCORPORATED whek'u

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/ ENGINEERING MEMORANDUM NO. 205 April 30, 1979 (Supersedes EM 205 April 11, 1978 and EM 205A May 25, 1977)

DETERMINING TEMPERATURE RATING OF FR INSULATED AND HTNS JACKETED KERITE CABLES FOR OPERATION IN WET AND ALTERNATE WET AND DRY LOCATIONS Temperature ' rating' of cables for wet and alternate wet and dry locations is established utilizing.the Arrhenius techniques but incorporating a reference material to relate actual field performance of cables to the higher temperature continuous moisture absorption tests on small insulated wires. This relationship is then used to predict the ' water aging' of material in field service that do not have an extended operating history.

The reference material used is regular _Kerite, which has had an extended service history encompassing in excess of one hundred million feet of many construction types in all gnvironments and at conductor operating tgmperatures o.' 70 to 75 C and. cable surface temperatures of 60 to 65 C.

The method by which this analysis is performed is described as follows:

The basis for comparison between insulations is the " insula-tion resistance". Tests have shown that this electrical pa-rameter is representative of aging in wet environments.

Change in capacitance and dissipation factor, however, is also measured. Samples energized with 600 volts AC, or not energized, showed no significant effect on the electrical Parameters measured. (Ref. 1)

One further question was whether current loading retarded or accelerated any electrical degradation. A laboratory test to answer this question (15-3 Lab Test Sheet No. 227 dated March 29, 1970, reference 2) gave no indication that current loading affected 'electricals'.

Having identified the relevant aging factors to be time and water temperature, the relationship between materials was i

sc3ected to be based on the time to reach one-half of the

original IR value. Other criteria could have been selected; however, the one-half IR point was something achievable in ,

reasonable time periods.

Test points in water for Kerite were at 90 C, 75 C and 52 C, and fog FR insulation (HI-70) and HTNS jacket (HI-70) 90 C j and 75 C were used.

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' EM 205 p2

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On this basis, compounds having essentially identical

' aging' slopes are expected to age similarly under similar environmental service conditions and their operating temp-eratures for equivalent aging would therefore be relatable.

Thus, from the attached chart, the performance of Kerite having a proven service record of morg than forty years at insulation surface. temperatures of 60 C and higher, it is seen ghat the equivalent continuous water immersion time Also, from at 60 C to reach one-half IR is 1950 hours0.0226 days <br />0.542 hours <br />0.00322 weeks <br />7.41975e-4 months <br />.

the chart, for FR Insulation and HTNS jacket, the water temperature required to reduce ghe This IR toanalysis one-halfindicates the original level that the in 1950 hours0.0226 days <br />0.542 hours <br />0.00322 weeks <br />7.41975e-4 months <br /> is 82 C.

FR jacket can be rated 22 C higher than Kerite. gThis material, however, is conservatively rated at 90 C. (Ref-erences 1,3, and 4)

In actual service, cables fully immersed in water will tend to have their surface temperatures approach the temperature of the water.

Therefore, attempting to establish a conductor temperature rating for cable (assumed to be dry) may not be as significant as determining what the environmental water temperature will be; however, this analysis provides a good comparison between newer materials and ser-vice-proven materials for general use conditions.

Laboratory tests to determine the effects of alternate wet and dry environments have also been conducted and indicate that contin-uous water immersion is more severe. (References 5,6,7 and 8).

It should be noted that salt water immersion is less severe than tap water. Refer to Product Evaluation Report No. 177, dated March 8, 1974 (Reference 9).

Also, the addicion of a jacket over the cabled insulated conductors shows a significant improvement of IR performance (Reference 10).

Laboratory References The information presented above and on the attached plot has been based on the references given below. The data has been collected as part of a continuing water absorption program and represents that which is presently available. These references are available for audit at the Kerite Company in the Engineering Depart-t ment.

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1. Engineering Project No. 75-40. Sample Nos. 38A, 39A, 38B and 39B.

2. Engineering 15-3 Lab Test Sheet 227, March 29, 1970 g

3. Chemical Lab Records, Samples75-118 (1971),75-119 (1971), 75-87 (19G5), 52-24 (1960),75-123 (1971)

4. 15-3 Lab Book-B, Pages 147, 182

5. Engineering Project No. 75-40, Electrical Lab Report No. 599.

6. A.Hvizd, Jr. 's Project No. 213, Reported December 21, 1967

7. 15-3 Lab Test Sheet No. 267 - FR Insulation, July 27, 1970

8. Engineering Project No. 75 FR Insulation

9. Product Evaluation No. 177, March 8, 1974

10. 15-3 Lab Book-B, Sample 1 MCB s/ , 4.oL or H. E FI~eming Electrical Engi ee REF/ jm Attachments cc: Book Holders APPROVED / / s _

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