ML20246N677

Proposed Tech Specs,Integrity of Containment Vessel Be Maintained at Level Consistent to Criteria in Spec 4.6.1.6

ML20246N677
Person / Time
Site:	Callaway
Issue date:	05/09/1989
From:	UNION ELECTRIC CO.
To:
Shared Package
ML20246N661	List: ML20246N657 ML20246N677
References
NUDOCS 8905190496
Download: ML20246N677 (4)

Text

_ _____-.

_ ULNRC-2003

_ 4. J '.' ***.

~, ' ATTAcw Mewt SAMPLE TECHMICAL SPECIFICATION l CONTA1NMENT SYSTEMS '

l CONTAINMENT VESSEL STRUCTURAL INTEGRITY 1.1HITING CONDITION F0P OPERATION 3.6.1.6 The structural integrity of the containment vessel shall be main-tained at a level consistent with the acceptance criteria in Specification 4.6.1.6.

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

ACTION:

a. With the abnorma d gradation ndicated by the conditions in Speci-fication 4.6 thin . .la.4, resto the tendons to the required level of integrity 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> a d perform an engineering evaluation of the containment and provid a Special Report to the Comission with-in 15 days in accordance ith Specification 6.9.2 or be in at least -

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HOT STANDBY within the xt 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 />.

b. With the indicated atrnormal degradation of the structural integrity other than ACTION a at a level below the acceptance criteria of Specification 4.6.16, restore the containment vessel to the required level of integrity ithin 15 days; perform an engineering evaluation of the containment and provide a Special Report to the Comission within 30 days in accordance with Specification 6.9.2 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 o, .scw cuea 3C4 within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. & % u,..n vu. m pmout. .

SURVEILLANCE REQUIREMENTS .

4.6.1.6.1 CONTAINMENT YESSEL TENI;DNS r. 5' The structural integrity of the prestr ing tendons of the containment vessel no shall be demonstrated at the end of 1. *. ::t 5 years following the initial containment vessel structural integrity test and at 5-year intervals ia ' " there-Mmo after.  !=  : -M :t ' :;:0 + ' r - r e ' + = > ^ - + " --~ + - " A ~

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• *tre t-td. The structural'integri-ox '-:-*-t'er ;;h;d k

$8 ty of the tendons :h::'d be demonstrated by:

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M a. Determining that a random but representative sam lec of at least

$cc // tendons ( 7 hoop, A y \ fSh(f orce within the P e-

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& invertedU)eachhaveaobservedlifT-off dicted limits established for each tendon. For each subsequent in-i l spection one tendon from each group shall be kept unchanged to de- / 2 velop a history and to correlate the observed data. The procedure '

of inspection and the tendon acceptance criteria shall be as follows:

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1. If the measured prestressing force of the selected tendon in a group 4 lies above the prescribed lower limit, the lift-off test is con- l E

sidered to be a positive indication of the sample tendon's accept-

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2. If the measured pre ressing force of the selected tendon in a group lies between the escribed lower limit and 90% of the prescribed e MM lower limit, two endons, one on each side of this tendon d eolo checked for their prestressing forces. If the prestressing forces of these two tendons are above 95% of e prescribed lower limits for the tendons, all three tendons be rest ed to the required level of integrity, and the tendon group be considered as acceptable. If the measured prestressing force of any two tendons fallsbelow95%ofthepregibedlowerlimitsofthetendons,ad- '

ditionallift-offtesting....1dbedonetope"ectthecauseand extent.cf such occurrence. The condition L. Y be considered as an indication of abnormal degradation of the containment structure.

sI.LL below 90% of

3. Ifthemeasuredprestressingforceofanytendonlie[idbecompletely the prescribed lower limit, the defective tend g h..

detensioned and additional lift-off testing 2 ... be done so as to determine the cause and extent of such occurrence. The condition 9 4  ; buld be considered as an indication of abnormal degradation of the containment structure.

4.- If the average of all measured p estressing forces for each group (corrected for average condition is found to be less than the mini-mumrequiredpregsslevelat/anchoragelocatior6forthatgroup, the condition d....-be considered as abnormal degradation of the containment structure.

5. If from consecutive surveillance the measured prestressing forces for the same tendon or tendons in a group indicate a trend of pre-stress loss larger than expected and the resulting prestressing forces will be less than the minimum required for the group before the next scheduled surveillance, additional lift-off testingd:uld.ALL be done so as to determine the cause and extent of such occurrence.

The condition 2:uld be considered as an indication of abnormal '

degradationof)tgcontainmentstructure.

6. .Unless there is abnormal degradation of the containment vessel during the first three inspections, the sample population for subsequent ins tendons ( 3 hoop,, @

@pectionsshallinclydeatleast

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b. performing tendon detensioning, inspections, and material tests on a previously stressed tendon from each group. A randomly selected tendon from each group shall be completely detensioned in order to identify broken or damaged wires and determining that over the entire length of the removed wire sample (which skuld include the broken wire if so identified) that: M

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1. The tendon wires are free of corrosion, cracks, and damageg

2. A minimum tensile strength of f4t/ hsi (guaranteed ultimate i strength.of the tendon material) exists for at least three wire sampiegs i (onefromeachendandoneatmid-length)cutfromeachremovedwire. the-m4nhun tendie F44kre et Sry e'e of the wtre-sampler ta maat W strength-test-4s-tir-indkat+on-ef-stmormal degradation-of-the-coetain-mantw e:::1 struct; e.

c. Performing tendon re ensioning of those tendons detensioned for in-spection to at least' force level recorded prior to detensioning or the predicted value, whichever is greater, with the tolerance wi retensioning df these ten-mate tensile strength Sf the tendons. Dugd-be measured simultaneous-dons; the changes in load and elongation ....-. sly at a minimum of th If the elongation corresponding to a between zero and the seating force.

specific loed)(differs by moreg10% from that recorded during the in- g stallation, an investigation L .w be made to ensure that the differenceanchora is not related to wire failures or s. lip ofm,uuns. wires in/ c+ m u m,,, m ,.r- .awa ,

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d. Verifying the OPERABILITYwoA of the sheat,hing filler grease by$ assuring:

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There are no changes in e pres'i6ce orpFysTH1 appiiarance of the

1. puid '

i sheathing filler-grees . /exceedi SY of the net duct volume, when in-

2. Amount df crease replaced 1 insta11at' ion pressure jected at8the 4rigin:

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3. Minimum grease coverage exists for the diffe,ren't~' parts of the ancher-sr u e age system, eed-d;te:t:d c rn general A examination visual '"nM M~of the con-d_rY

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tainment exterior surface .

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5. The chemical propertie 1er ma&al teri are witYn the Nr g am-"

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m namwnwn ance limits p:if u' Water Content f M :: ..g%

C-1co, on mwr-(Sr tend:n: 0"TSM50T-)-

s cizding 0--1% L.y *t.

' L.. den: C"T U ZT' f d i . . , Z L., .J .

j g.-a. u .t.t.l..l 0 - 10 ppm v- de u,moua > Chlorides 0 - 10 ppm 4 & mo uw a Nitrates 0-cKppm J N% M e Sulfides Reserved Alkalinity 0---405-cf ths-installed-valuet-W tw. c,sa-Nrwrua. Dise Lii.Lers)- > 0 - 5 (fer elder-grease} AA-

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s an assurance 4.6.1.6.[ End Anchorages and Adjacent Concrete Surfaces ndon anchorage as-of the structural integrity of the containment vessel, ts, wedges, and but-sembly hardware (such as bearing plates, stressing wastonheads) net o Ber4ng :ea.bincd inspec4 ton _isee_ Attachment 14rfor-the-containment Tendon 4esselv having 411 h: pen (en, enty-v4sua.1 inspectinn need-to-txe-performed.be visual anchorages selected for inspection '

practical without dismantling the load bearing components of the anchorages.

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ULNRC-2003 l

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Bottom grease caps of all vertical tendons M beThe visually inspected surrounding to concrete l detect grease leakage or grease cap deformations. l spu. s w id also be checked visually for indication of any abnormal condition. -

~ i the con- l The exterior surf 4

[ 4.6.1.6.3 ~ Containment "

E be visuallyYessel examined Surfaces to detect areas of arge spall, severe ~

tainment scaling,Dt @lflFcking in an area of 25 sq. f t. or more, hgr, surface deteriora-tion or disintegration, or grease leakage, each of .r ::r be considered as y evidence of abnormal degradation of structural integr ty of the containment, This inspection shall be performed prior to the Type A containment leakage l rate test.

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