ML20237B572

From kanterella
Jump to navigation Jump to search
Proposed Tech Specs 4.6.5.1b.3 Re Ice Condenser Sys Components W/Respect to Accumulation of Frost or Ice
ML20237B572
Person / Time
Site: Mcguire, McGuire  Duke Energy icon.png
Issue date: 08/12/1998
From:
DUKE POWER CO.
To:
Shared Package
ML20237B541 List:
References
NUDOCS 9808190050
Download: ML20237B572 (4)
v • d • e


Text

. . . . _ _ , _ _ _ .

CONTAINMENT SYSTEMS 3/4.6.5 ICE CONDENSER I'CE BED LIMITING CONDITION FOR OPERATION 3.6.5.1 The ice bed shall be OPERABLE with:

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,
d. A total ice weight of at least 2,099,790 pounds at a 95% level 5 of 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 H0T 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 4.6.5.1 The ice condenser shall be determined OPERABLE:

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 Monitoring System to verify that the maximum ice bed temperature is less than or equal to 27'F,
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 20*C;
2) Weighing a representative sample of at least 144 ice baskets and verifying that each basket contains at least 1081 lbs of ice. The representative sample shall include 6 baskets from each of the 24 ice condenser bays and shall be constituted of 9808190050 980812 PDR ADOCK 05000369 p PDR McGUIRE - UNIT 1 3/4 6-20 Amndmiiit No. 1Gfr-

l.

CONTAINMENT SYSTEMS SURVEILLANCE RE0VIREMENTS (Continued) 1 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 1081 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 1081 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 mini-mum 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 1081 pounds / basket at a 95% level of confidence.

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 2,099,790 pounds; and

3) Verifying, by a visual inspection of at least two flow passages per ice condenser bay, that the accumulation of frost or ice on flow passages between ice baskets, past lattice frames, through the intermediate and top deck floor grating, er p::t the 10::Or_

nlct plen= :eppert tm4ere: :nd turning ; nca is restricted to a thickness of less than or equal to 0.38 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 i representative sample of 20 additional flow passages from the same y shall be visually inspected. If these additional flow passages are found acceptable, the surveillance program may proceed considering the single deficiency as unique and accept-able. More than one restricted flow passage per bay is evidence of abnormal degradation of the ice condenser.

c. 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.

ot.* At lea.st ow F rebh out.y b y verWy ;7 4Ast +Ae accowlat.'em. d frost ard/ov ice on +b lover inletp*

supp=l' s+ract un-s anel +vr-n.;9 vomo is redn6tel 4, a- l

+A:eAneu ef leu A or ep.I% o.38 toc A . l

  • Noi appl *c aN udIl d*fer an. o effapc of sonicled o/vrdlewfo per ofM S ur veilla nc.t s u b ty u d to Aup v.sf O ,1999. m. -

McGUIRE - UNIT 1 3/4 6-21 Am:ndm:nt k. 155- i,

CONTAINMENT SYSTEMS 3/4.6.5 ICE CONDENSER f ICE BED l

l LIMITING CONDITION FOR OPERATION 3.6.5.1 The ice bed shall be OPERABLE with:

i

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, l t
b. Flow channels through the ice cadenser,
c. A maximum ice bed temperature of less than or equal to 27'F,
d. A total ice weight of at least 2,099,790 pounds at a 95% level of confidence, and
e. 1944 ice baskets.

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

J 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 />.

j SURVEILLANCE RE0UIREMENTS 4.6.5.1 The ice condenser shall be determined OPERABLE:

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 Monitoring System to verify that the maximum ice bed temperature is less than or equal to 27'F, ,
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 20'C; -
2) Weighing a representative sample of at least 144 ice baskets  !

and verifying that each basket contains at least 1081 lbs of  !

ice. The representative sample shall include 6 baskets from each of the 24 ice condenser bays and shall be constituted of

)!

McGUIRE - UNIT 2 3/4 6-20 -Ancad;cnt ik. 148-

.  ; .- .  ? fik ,.

%CL By; . Q. Q Qg J :.;,Q.; Q, yllQ3QQ"~ QMQ'p.3 MQl"[.7

n. - .

._ .;.. .~ .;..,.,.s. ..

, Y l ;, Y

. _ : ' _;er( W _,(_'l

'I

'; ? l n f . ' l ' N { '_ ^. '[

.\ ' ' {' I, I N' ~: '

CONTAINMENT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 1 basket each from Radial Rows 1, 2, 4, 6, 8, and 9 (or from j 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 1081 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 1081 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 - t Bays 9 '.hrough 16, and Group 3 - Bays 17 through 24. The mini-mum 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 1081 pounds / basket at a 95% level of confidence.

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 2,099,790 pounds; and

3) Verifying, by a visual inspection of at least two flow passages per ice condenser bay, that the accumulation of frost or ice on flow passages between ice baskets, past lattice frames, through l the intermediate and top deck floor grating, r pnt th: 6.s i J-let ple.= : pp:rt strettere: :nd turning v:::: is restricted '

to a thickness of less than or equal to 0.38 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 sampie 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 accept- i

, able. More than one restricted flow passage per bay is I evidence of abnormal degradation of the ice condenser.

c. 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 l ice baskets shall be raised at least 12 feet for this inspection.

M.N+ le qsd ohce pr refoel:n oota 67 y,cMy * +Ad ye l accu >uld:en, oS fresk ard or ic. sn. +ke lsecer- inld pluun suppar+ s+rve%res ud +vre.:q vues is as+e dvd 4a a.

+A:c.k.m.u of las & or egalfo C08 ruA.

1e Not appl:c..l.l. un.ttI dhr ah, oJfa.

  • ed suMic;,~+ olorh b pedom ud i IMO.

s urveilla.e.cc McGUIRE - UNIT 2 subseguv8 +o 3 huj/4 6-21--Amendiien L. n 140-

'^

aumm.a Q v

n.x ~

} [ m.j iw.m V N r h k f ,. p ij ) f { Q & Ym-asanm(u_Q&ff ;wa .

Retrieved from "https://kanterella.com/w/index.php?title=ML20237B572&oldid=3116307"