ML18017A639
| ML18017A639 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 09/25/1979 |
| From: | Mcduffie M CAROLINA POWER & LIGHT CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| DCN-500-347, NUDOCS 7910010277 | |
| Download: ML18017A639 (10) | |
Text
P REGULATORY INFORMATION DISTRIBUTION SYSTEM (BIDS)
ACCESSION NBR:7910010277 DOC,DATE: 79/09/25 NOTAH1ZED; NO DOCKET fC FACIL:50-400 Shearon Har ris Nuclear Power Plant~
Oni t ii Carol ina 05000400 50-401 Shearon Harris Nuclear Power Plant~
Unit 2q Carolina 05000401 50"402 Shearon Harris Nuclear Power Plantp Unit 3p Carolina 05000402 AUTHNAME AUTHOR AFFII IATION MCDUFFIE~M.A.
Carolina Power 8 Light Co ~
REC IP ~ NAME REC IPIEN I AFFILIATION DENTONiH ~ RE Office of Nuclear Reactor Regulation
SUBJECT:
Forwards Design Change Notification 500-347 to Ebasco Spec CAR"SH"CH4<
"EmbankmentsgDams<Dikes 6 Channelsg"
~hich changes requirement to control moisture content of impervious core matl for west auxiliary dam above 225 ft, DISTRIBUTION CODE:
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Carolina Power & Light Company September 25, 1979 Mr. Harold R. Denton, Director Office of Nuclear Reactor, Regulation United States Nuclear, Regulatory Commission
'Washington, D.C.
20555 SHEARON HARRIS NUCLEAR POWER PLANT UNIT NOS. 1, 2,. 3 AND 4 DOCKET NOS. 50-400, 50-401, 50-402 AND'50-403 MOISTURE CONTROL OF WEST AUXILIARYDAM IMPERVIOUS CORE MATERIAL
Dear Mr. Denton:
Attached is DCN 500-347 to Ebasco Specification CAR-SH-CH4 "Embankments, Dams, Dikes, and Channels" which changes the requirement to control moisture content of the impervious core material for the west auxiliary dam above elevation 225 feet to within -1% and
+3% of optimum moisture.
CAR-SH-CH4 currently requires moisture content to be controlled with +2% of optimum moisture.
The contents of this DCN have been discussed with members of your staff.
It is requested that you review and formally approve this change in order to allow construction of the west auxiliary dam to proceed.
Yours very truly, M. A. McDuffie Senior Vice President Engineering 6 Construction MAM/jcb Attachment cc:
James P. O'Reilly V9~00iOggq 411 Fayetteville Street o P. O. 8ox 1551 e Raleigh, N. C. 27602
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DESIGH CH'tHGE HOTIFICATIO I PAOJCCT OP5 NO, SHEARON HARRIS NUCLE R POf(ER PLANT I
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I Specification No. CR Other g comate, ~ erL AREA OF CHANGE: g Malor Change Q Minor Change
+ Hold Construction Activities in area defined herein pending receipt of'ormally revised documentis) and/or ievised DCN. IC)1>ID rc)R JOAN/6D F58'.
C. HQH(fJ4 /'4T/C8 l" 'roceed with Construction on basis of modification(s) prescribed by this OCN.
. ArtTICIPATEO REVISION DATE OF FORMAL DOCUMENTS PPOPOSED CHAIIGE:
DESCRIPTION REASON FOR CHANGE Q
Field Change Request (FCR No.
)
Q Required modifications to design or specitication Q
Dispos'ition ol nonconforming items Q
Changes in regulatory or other requirements Operational e)ipeiience Other EXHIBITS ATTACHED:
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, Ebasco Sprcificntiott Eiubankments,
- Dams, Dilc s nnd Chnnnels Project Identification No. CAR-Sll-CII-4 10.
EHIlANKIIENT COItE (Cont 'd )
. 5 Icloisture Cont:ro1 The material placed in each layer during compaction, by rolling, shall cont:ain'ithin
+ 2 percent t:he amount of moisture requi.red for maximum degree of com-paction as determined by the Owner, nnd the moisture content:
shal.1 be iniform ie, within tlte tolerances'ndicaLed I:ltroughout L'he thiclcness of the layer.
'fhe application of water t:o the mnt:erial, if required, sltall be performed at the st:ockpiles, supplemented as required eitlter by sprinkling the preceding layer prior to placing new material thereon or by sprinkling and mixing Lhe new maL'erial in place pxior t:o rolling or by a combination of tlte two methods.
No material having a
wa "er content greater.
than 4 percent above the optimuut shall be placed on the embanlcment:
nor shall any.tuaterial l>e placed if t:he surface of the embankment i>as moisture more than 2 percent greater t:ltan opt:imum.
Such matcx'ial!
or surfaces shall be dx'ied out by harrowing or discing and arrating t:o bring t:he moistuxe content wit:hin 2 percent of the optimum before rolling or placing new
.ma teria 1.
IIoisture content of: the mat:erial sha'll be det:crmined by either one of. t!te fol]owing methods ASTII clesignation D2216 or D3017 or by "speedy" moisture t:est:er, microwave oven or field st:ove metltod aL the option of Lhe-Owner.
If'STH D3017, "Speedy" moisture t:ester, microwave ovc n or. field st ove method is used t:o <let:erruine moist:ure content one calil>raLion or. check'est for the method by comparison with 'the L'est by ASTH D2216 sltnll bc. performed after every t:en tests.
IV't R5 For ASTII D3017, "Speedy" moisture tester, micrc.eave oven or fielcl stove method calibration or clteclc t:est sltall be performed on n similar material for. which tlte method is used in the field. If tlte calibration or. check test indicates n clcviation of: more than + 2/, moist:ure content L'he method will be discontinued.
An allowance for deviation in moisture content by these methods as determined by calil>raL'ion test:s in comparison wit!t ASTi'I D2216 and
".or the tolerance of" tlte method above or below tlte calibrat:ion curve shall be made so tltnt the moisture content of the fillmaterial is wit:hin 2 percent of: the opt:imum moisL'ure cont:ent as stated in Pnxagraph 10.5 above.
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Any sun-dried, hardened foundation surface or smooth bedding surFace sltall be prepared for new mat:erial be discing or plowing so as to loosen t:he entire surface to a depth of 2 in.
Hater shall be added, if nec<ssary to t:he material at the I:ime of scarifying so that: iL shall be within -I-2 percent of optimum water content:
For compaction.
Iuunedintely after such scarifying t:he next layer of material sltall be placed over.
t:he ba: c: and compacted as pecified in Paragraplt 10.4.
The top of surface of freshly placed and rolled layers ordinarily will require no prep;fration otlter than moistcni.ng ahead of t:he new layer when t!te new material is
<!rier'titan,-2 percent of optimum wnt:er cont:ent.
ATTACHMENT TO DCN 550-347
'~487
'4
.5 Moisture Control The material placed in each layer during compaction, by rolling, shall con-tain within +2 percent of optimum moisture content as defined by the Standard Proctor Compaction Test and determined by the Owner.
The exception to this moisture'ontrol requirement is the West Auxiliary Dam impervious core above elevation 225 which shall have a moisture content, during compaction, within
-1 percent and
+3 percent oi optimum moisture content.
The moisture content shall be uniiorm; ie, within the tolerances indicated throughout the thick-ness of the layer.
The application of water to the material, if required, shall be performed at the stockpiles, supplemented as required either by sprinkling the preceding layer prior to placing new material thereon or sprinkl-ing and mixing the new material in place prior to rolling or by a combination of the two methods.
No material having a water content greater than 4 percent above the optimum shall be placed on the embankment nor shall any material be placed if the surface of the embankment has moisture more than 2 percent greater than optimum (3 percent greater than optimum above elevation 225 in the West Auxiliary Dam).
Such material or surfaces shall be dried out by harrowing or discing and aerating" to bring the moisture content within the above speciiied moisture'ontents required ior compaction.
Any sun-dried hardened foundation surface or smoot' bedding surface shall be prepared for new material, by discing or plowing so as to loosen the 'entire surface to a depth of 2 in.
Water shall be added, if necessary, to the mat-erial at the time of scarifying so that it shall be within the above specified moisture ranges'equired for compaction.
Immediately after such scarifying the next layer oi material shall be placed over the base and compacted as specified in Paragraph 10.4.
The top of surface of freshly placed and rolled layers ordinarily will require no preparation other than moistening ahead of
'he new layer when the new material is drier than the above specified compac-tion moisture ranges.
Moisture content of the material shall be determined by any of the following
- methods, at the option of the Owner:
ASTM designation D2216 or D3017 or by "Speedy" moisture tester, microwave ovez or iield stove method.
If ASTH D3017, "Speedy" moisture tester, microwave oven or field stove method is used to determine moisture content these methods 'shall be continuously calibrated against ASTM D2216 and the calibrated reading shall be used as the moisture reading.
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.5 Hoisture Control (Cont'd)
One calibration or check test for the method, by comparison with ASTH D2216 shall be performed after every ten tests on similar material for which the method is used in the field.
The calibration check tests shall be statistically evaluated.
The method of moisture determination will be considered acceptable if the continuous calibration check tests against ASTH D2216.indicate a devia-tion of no more "than + 1 percent moisture content with a ninety percent statisti-cal confidence level.
If the continuous calibration tests indicate a greater moisture content deviation and lower confidence level the method will be dis-continued.
No allowance for deviation in moisture, content by these methods other than use of the calibration curve will be required if the accuracy of the method is within the 1 percent tolerance range at ninety percent con-fidence level.
Ifowever, if a field moisture measurement made by a calibrated
- "Speedy",
microwave oven or field stove moisture measurement is within 0.5
+
percent of the specification limits; i.e., outside 1.5 percent of optimum or outside +2.5, -0.5 percent of optimum above elevation 225 in the Hest Auxiliary Dam, a moisture check shall be performed using ASTH D2216.
This check value will be documented as the true field moisture measurement;
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