ML20237B575

Proposed Tech Specs 4.6.5.1b.2 Re Ice Condenser Sys Components W/Respect to Accumulation of Frost or Ice

ML20237B575
Person / Time
Site:	Catawba
Issue date:	08/12/1998
From:	DUKE POWER CO.
To:
Shared Package
ML20237B556	List: ML20237B554 ML20237B575
References
NUDOCS 9808190052
Download: ML20237B575 (6)

Text

l CONTAINMENT SYSTEMS

' 3/4.6.5 ICE CONDENSER ICE BED LIMITING CONDITION FOR OPERATION 1

3.6.5.1 The ice bed shall be OPERABLE with:

a. The stored ice having a boron concentration of at least 1800 ppm j boron as sodium tetraborate and a pH of 9.0 to 9.5, l b. Flow channels through the ice condenser,

c. A maximum ice bed temperature of less than or equal to 27*F,

d. A total ice weight of at least 2,475,252 pounds at a 95% level of j confidence, and

e. 1944 ice baskets.

APPLICABILITY: MODES 1, 2, 3, and 4.

ACTION:

With the ice bed inoperable, restore the ice bed to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 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 SHUT-DOWN 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 l 4.6.5.1 The ice condenser shall be determined OPERABLE: l

a. At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by using the Ice Bed Temperature Monitor-ing System to verify that the maximum ice bed temperature is less than or equal to 27'F, i

b. At least once per 9 months by:

1) Chemical analyses which verify that at least nine representative samples of stored ice have a boron concentration of at least 1800 ppm as sodium tetraborate and a pH of 9.0 to 9.5 at 25'C; and

2) Verifying, by a visual inspection of at least two flow passages per ice condenser bay, that the accumulation of frost or ice on ;g g flow passages between ice baskets, past lattice frames,fthrough the top deck floor grating / prpapt Ahy lpet i(19 tplyn)dn fuppeft 9808190052 980812 PDR ADOCK 05000414 p PDR ,

CATAWBA - UNIT 1 3/4 6-33 Amendment No.

CONTAINMENT SYSTEMS SURVEliLANCE REQUIREMENTS (Continued) ft/@jyp's/apd/t,arvi(g/yhye/, is restricted to a thickness of less l than or equal to 0.33 inch. If one flow passage per bay is found to have an accumulation of frost or ice with a thickness of greater than or equal to 0.38 inch, a representative sample of 20 additional flow passages from the same bay shall be visually inspected. If these additional flow passages are found acceptable, the surveillance program may proceed considering the single deficiency as unique and ,

acce) table. More than one restricted flow passage per bay is evidence of a) normal degradation of the ice condenser. .

c. At least once per 18 ironths by: ,

Weighing a representative sample of at least 144 ice baskets and

)#fERI- verifying that each basket contains at least 1273 lbs of ice. The representative sample shall include six baskets from each of the 24 ice condenser bays and shall be constituted of one basket each from Radial Rows 1, 2, 4, C, 8, and 9 (or from the same row of an adjacent bay if a basket from a designated row cannot be obtained for weighing) within each bay. If any basket is found to contain less i than 1273 pounds of ice, a representative sample of 20 additional baskets from the same bay shall be weighed. The minimum average weight of ice from the 20 additional baskets and the discrepant basket shall not be less than 1273 pounds / basket at a 95% level of confidence.

The ice condenser shall also be subdivided into 3 groups of baskets, as follows: Group 1 - Bays 1 through 8, Group 2 - Bays 9 through 16, and Group 3 - Bays 17 through 24. The minimum average ice weight of the sample baskets from Radial Rows 1, 2, 4, 6, 8, and 9 in each group shall not be less than 1273 pounds / basket at a 95% level of .

l confidence.

The minimum total-ice ccndenser ice weight at a 95% level of confidence shall be calculated using all ice basket weights determined during this weighing program and shall not be less than 2,475,252 pounds.

d. At least once per 40 months by lifting and visually inspecting ttje accessible portions of at least two ice baskets from each' one-third of the ice condenser and verifying that the ice baskets are free of detrimental structural wear, cracks, corrosion or other damage. The ice baskets shall be raised at least 12 feet for this inspection.  ;

l CATAWBA - UNIT 1 3/4 6-34 Amendment No.

1 . ,

INSERT l

! 1) Verifying, by a visual inspection of each ice condenser bay, that the accumulation of frost or ice on the lower inlet plenum support structures and turning vanes is l restricted to a thickness of less than or equal to 0.38 l inch. An accumulation of frost or ice greater than this l thickness is evidence of abnormal degradation of the ice condenser.

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CONTAINMENT SYSTEMS

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. 3/4.6.5 ICE CONDENSER ICE BED i

LIMITING CONDITION FOR OPERATION ,I 3.6.5.1 The ice bed shall be OPERABLE with-l a. The stored ice having a boron concentration of at least 1800 ppm boron as sodium tetraborate and a pH of 9.0 to 9.5, (

b. Flow channels through the ice condenser,

c. A maximum ice bed temperature of less than or equal to 27*F, j

d. A total ice weight of at least 2,475,252 pounds at a 95% level'of  !:

confidence, and e

e. 1944 ice baskets. l APPLICABILITY: MODES 1, 2, 3, and 4. I ACTION:

With the ice bed inoperable, restore the ice bed to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 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 SHUT-DOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. {

i SURVEILLANCE REQUIREMENTS I l

4.6.5.1 The ice condenser shall be determined OPERABLE: j

a. At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by using the Ice Bed Temperature Monitor-ing System to verify that the maximum ice bed temperature is less I than or equal to 27 F, l

b. At least once per 9 months by:

1) Chemical analyses which verify that at least nine representative samples-of stored ice have a boron concentration of at least '

1800 ppm as sodium tetraborate.and a pH of 9.0 to 9.5 at 25'C; .

and l i

2) Verifying, by a visual inspection of at least two flow passages j per ice condenser bay, that the accumulation of frost or ice on; g '

flow passages between ice baskets, past lattice frames,fthrough the to

/N/y Pdeck floor gratingpr/pfsf tAe/1/w/r/ir/lef y1/n ry' CATAWBA - UNIT 2 3/4 6-33 Amendment No.

l ,

l-CONTAINMENT SYSTEMS

' SURVEILLANCE REQUIREMENTS (Continued) ftg@ft/s//nti/ fufyrit@ h(nff is restricted to a thickness of less l than or equal to 0.38 inch. If one flow 3assage per bay is found to I

have an accumulation of frost or ice wit 1 a thickness of greater than or equal to 0.38 inch, a representative sample of 20 additional flow l

passages from the same bay shall be visually inspected. If these additional flow passages are found acceptable, the surveillance l program may proceed considering the single deficiency as unique and i acceptable. More than one restricted flow passage per bay is evidence of abnormal degradation of the ice condenser.

c. At least once per 18 months by:

Weighing a representative sample of at least 144 ice baskets and

\M verifying that each basket contains at least 1273 lbs of ice. The representative sample shall include six baskets from each of the 24 ice condenser bays and shall be constituted of one basket each from Radial Rows 1, 2, 4, 6, 8, and 9 (or from the same row of an adjacent bay if a basket from a designated row cannot be obtained for weighing) within each bay. If any basket is found to contain less than 1273 pounds of ice, a representative sample of 20 additional baskets from the same bay shall be weighed. The minimum average weight of ice from the 20 additional baskets and the discrepant basket shall not be less than 1273 pounds / basket at a 95% level of confidence.

The ice condenser shall also be subdivided into 3 groups of baskets, as follows: Group 1 - Bays 1 through 8, Group 2 - Bays 9 through 16, and Group 3 - Bays 17 through 24. The minimum average ice weight of the sample baskets from Radial Rows 1, 2, 4, 6, 8, and 9 in each group shall not be less than 1273 pounds / basket at a 95% level of ,

confidence. l The minimum total ice condenser ice weight at a 95% level of confidence shall be calculated using all ice basket weights determined during this weighing program and shall not be less than i 2,475,252 pounds.

d. At least once per 40 months by lifting and visually inspecting the accessible portions of at least two ice baskets from each one-third of the ice condenser and verifying that the ice baskets are free of detrimental structural wear, cracks, corrosion or other damage. The ice baskets shall be raised at least 12 feet for this inspection.

CATAWBA - UNIT 2 3/4 6-34 Amendment No.

f INSERT l

1) Verifying, by a visual inspection of each ice condenser l . bay,.that the accumulation of frost or ice on the lower

! inlet plenum support structures and turning vanes is restricted to a thickness of less than or equal to 0.38 inch. An accumulation of frost or ice greater than this thickness is evidence of abnormal degradation of the ice condenser.

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