ML19326D241
| ML19326D241 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 11/21/1973 |
| From: | Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML19326D239 | List: |
| References | |
| NUDOCS 8006090668 | |
| Download: ML19326D241 (7) | |
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REACTOR CONSTRUCTION PEPMIT AND OPERATING LICENSE
'g Docket No. 50-329 Docket No. 50-330 Amendment No. 23 Enclosed herewith, emending and supplementing the above-entitled applicatior-are revised pages 5-h9, 5-50, and 5-51, and new page 5-51a for 1,:.orporation into the Preliminary Safety Analysis Report submitted with the original application on January 13, Uts9, as amended.
The new and revised pages bear the notation " Amendment No. 23, 11/73" and are marked in the margin to indicate where changes have been made.
This amendment is submitted in order to more clearly define the nondestructive examination requirements for seas velds on the reactor building containment liner plate and penetration's.
The inspection requirements and acceptance criteria are in accordance with the " Proposed Standard Code for Concrete Reactor Vessels and Containments" (Proposed Section III, Division 2 to the ASME Boiler and Pressure Vessel Code) issued in April 1973, by the ACI-ASIE Technical Co=mittee on Concrete Pressure Components for Nuclear Service.
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2 We request that final Staff review of this amendment be made to conform to the Project need date of December 7,1973 in crder to accommodate the schedule for field welding of the reactor building liner plate.
CONSGIERS POWER COMPMY Dated November 21, 1973 By Stephen H. Howell, Vice President Sworn and subscribed to before me on this 21st day of November,1973
(! ~ A /% ll Hotary Public, Jackson County, Michigan My Co::: mission Expires May 18, 1976 l
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Regulatory Docket File
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In the Matter of
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Application for Reactor i Construction Permit and )
Docket No. 50-330 {
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Operating License
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CERTIFICATE OF SERVICE Amendment No. 23 to Consumers Power Company's Application for Reactor Construction Permit and Operating License fc-Midland Plant Units Nos. 1 and 2 has been served today on Raymond A. VanSteenhouse, Chairman of the Board of Commissioners of Midland County, Michigan, and on Robert B. Chatterton, Township Supervisor, Midland Township, Midland County, Michigan, by deposit in the United States mail.
Charles E. Bayless Attorney Consumers Power Company Dated:
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NAll procedures are subject to approval.
a, post-tensioning system supplier is provided with prestressing forces, the antiqipated concrete elastic, shrinkage, and creep prestress losses, and the maxim'un prestress forces for each stage of prestressing. The supplier incor-poratesNall this information along with any steel relaxation, friction, and anchorage, losses to establish the initial Jacking force fer each sequential operation.
Force and stress measurements are made by measuring the elengation of the prestressing steel and ecmparing it with the force indicated by the jack-dynamcmeter or pressure gage. The gage indicates the pressare in the jack within plus or mirius two percent. Force-jack pressure gage or dyna =cmeter combinations are calibrated against known precise standards just before application of prestr'essing forces begins and all calibrations are so certi-fled prior to use. Prdssure gages and jacks so calibrated are aivays used together.
During stressing, records are, kept of elongations as well as pressures obtained. Lift-off stress readings are taken at the end of each stressing operation to' check the actual ' stress in the tendon, Jack-dynamometer or gage ecmbinations are checked against elongation of the tendons and the cause of any discrepancy exceedin'g plus or minus five percent of that pre-dicted by calculations (using average load elongation curves) is corrected, and if cauced by differences in loadselongation from averages so documented.
Calibration cf the jack-dynanc=eter dr pressure gage ce=binations is main-tained accurately within above limits.\\
5.1.h REACTOR SUILDING INSPECTION, ESTING, AND SURVEILLANCE 5.1.h.1 Tests to Insure Liner Integrity
'N As the structure is constructed, and after it 'is complete with liner, con-crete structures, and all electrical and piping ' penetrations, equipment hatch, and personnel locks in place, the followin'gs tests are performed:
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a.
Construction Tests: These take place duri'ng the installation of the reactor building liner.
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Preoperational Tests:
These are performed afte'rs. the erection of the structure is complete but before reactor op'eration.
N 5.1.h.l.1 Tests on Liner During Construction N
Inspection procedure to be employed during construction for tne lin,er seam velds, liner fastening, and around penetrations consists of visual inspection, vacuum box soap bubble testing, radiography, and dye penetrant testin'g.
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a.
Visual Inspection of Welds
\\N All of the velding is visually examined by a technician responsibl'e for velding quality control. The criteria for work =anship and visual quality of welds are as follows:
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Each weld shall be uniform in vidth and size throughout its full length. Each layer of velding shall be smooth and free of slag, cracks, pinholes, and undercut, and shall be ec=pletely fused to the adjacent veld beads and base metal.
In addition, the cover pass shall be free of coarse ripples, irregular surface, non-unifon:: bead patter, high crown, and deep ridges or valleys be-tween beads.
Peening of welds vill not be permitted.
Butt velds shall be of multipass construction, slightly convex, of unifor= height, and have full penetration.
Fillet velds shall be of the specified size, with full throat and legs of unifor= length.
b.
Soap Bubble Tests All of the welding which is covered by concrete or otherwise in-accessible after construction is vacuum box soap bubble tested.
In this test a vacuum box containing a window is placed over the area to be tested and is evacuated to produce at least 5 psi pres-sur.e differential.
Before the vacuum box is placed over the test area, a soap solution is applied to the weld and any leaks are in-dicated by bubbles observed through the window in the box. The soap solution consists of equal parts of corn syrup, liquid deter-gent, and glycerin. The solution is prepared not more than 'A hours preceding the test and its bubble formation properties are checked with a sample leak every half hour during the test.
c.
Radiography Radiography is used as an aid to quality control.
The primary purpose of the liner and the welds therein is to provide leak tightness integrity to the post-tensioned concrete reactor building.
Structural..tegrity of the reactor building is provided by the post-tensioned concrete and not by the liner.
Radiography is not recognized as an effective method for examining welds to assure leak tightness.
Therefore, the only benefit which can be expected from radiography in connection with obtaining leak tight velds is an aid to quality control.
Random radiography of each velder's work provides structural verification that the welding is or is not under control and is done in accordance with the previously established and qualified procedure. Additionally, employing random radiography to inspect each velder's work has been proven by past experience to have a positive psychological effect on inproving overall welding workmanship.
The criterion for radiographic techniques is in accordance with
- Paragraph UW-51 of Section VIII of the ASNE Code. At least one spot radiograph is taken in the first 10 feet of welding completed in the flat, vertical, horizontal, and overhead positions by each 5-50 t
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velder. Thereafter, approximately 10 percer.t of the velding is spot examined cn a random basis, in such =ainer that an approximate equal number of spot radiographs is taken flom the verk of each velder.
d.
Dye Penetrant Dye penetrant inspection is also used as an aid to quality control.
The field velding inspectors use dye penetrant inspection to closely examine velds judged to be of questionable quality on the basis of the initial visual inspection. Also, dye penetrant inspection is used to confirm the complete removal of all defects from areas which have been prepared-for repair velding.
Dye penetrant in-spection of liner velds is in accordance with Appendix VIII,
" Methods for Liquid Penetrant Examination," of Section VIII of the ASME Boiler and Pressure Vessel Code.
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e.
Initial Leak Test for Base Slab Liner Plate Welds The velds for each section of base slab liner are vacuum box soap bubble tested L= ediately upon installation. After success-fully passing this leakage test, they are covered with test channels and the particular velds associated with that section of liner plate are pressure tested for a period of at least 15 minutes with no drop in pressure. Any repairs are carried out utill:1ng the same high standards and control exercised in the initial construc-tion.
5 1.4.1.2 Preoperational Integrated leak Test The design leak rate is not more than 0.1 percent by volume of the contained latmospherein24hoursat 67 psig.
It has been demonstrated that, with good quality control during erection, this is a reasonable requirement.
The basis of the leak rate test is the reference volume method.
Every effort is made to demonstrate the leak tightness of the reference volume ;ystem.
The entire reference volume system is pressuriced to a minimum of 100 psig with air containing 20 veight percent Freon. All reference volume joints are bagged with plastic and the system held at this pressure for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
The reference volume system, especially the joints, is checked with a halogen leak detector to demonstrate integrity.
In addition to the usual calculation of leak rate as a function of pressure differential, air is returned to the reactor building at the conclusion of the test through a precision gas meter until the differential pressure is returned to its original condition.
This provides a check on the calculated leak rate. Reactor building ambient temperature and humidity are also measured during the course of the test to provide further backup information.
l The initial leak rate test consists of establishing a leak rate et 67 psig.
Because the reactor building is a thick walled concrete structure, short-i term temperature or meteorological variations should not rave any appreciable 5-51 Amendment No. 1h T/31/70 l
_AEA DISTRIBUTION FOR PART 50 DOCKE* *.ATERIAL (TEMPORARY FORM)
CONTROL NO: 8396
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FILE:
FROM:
DATE OF DOC DATE REC'D LTR MEMO RPT OTHER Consumers Power Company Jackson, Michigan 49201 11-21-73 11-23-73 X
S. H. Howell TO:
J. F. O' Leary 1 signed SENT LOCAL PDR X
CLASS UNCLASS PROP INFO INPUT NO CYS REC'D DCCKET NO:
XXX 70 330 DESCRIPTION:
ENCLOSURES:
Ltr trans the following:
AMDT d 23 to PSAR: notarized 11-21-73, consis ing of.............
(1) Rev & addl pgs, tables & figs to the PSAR ACKNOWLED9ED (2) Cert Sv showing sv of Amdt #23 to th PSAR upon R. A. Vans teenhouse, chrmn, Board DO NOT. REMOVE of Commissioners of-Midland Co. Mich.
PLANT NAME: Hidland Units 1 & 2
( 3 Orig & 67 cys rec'd & 1 Cert Sv rec'd )
FOR ACTION /INFORMATION 11-23-73 GC BUTLER (L) vSCIMENCER(L)
ZIEMANN(L)
REGAN(E)
W/ Copies W/ 2 Copies W/ Copies W/ Copies CLARK (L)
STOLZ(L)
DICKER (E)
W/ Copies W/ Copies W/ Copies W/ Copies GOLLER(L)
VASSALLO(L)
KNIGHION(E)
W/ Copies W/ Copies W/ Copies W/ Copies KNIEL(L)
SCHEMIL(L)
YOUNGBLOOD(E)
W/ Copies W/ Copies W/ Copies W/ Copies INTERNAL DISTRIBUTION wG FI F TECH REVIEW VDENTON (Itr)
A/T IND
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PDR HENDRIE VURIMES LIC ASST BRAIIMAN OGC, ROOM P-506A SCHROEDER
/GAMMILL DIGGS (L)
SALTZMAN MUNTZING/ STAFF vMACC ARY (ltr) vfASTNER GEARIN (L)
B. HURT vCASE (ltr)
A ICdT BALLARD yt0ULBOURNE (L)
PMNS y,GIAMBUSSO (l tr) vPAWLICKI SPANGLER LEE (L)
VMCDONALD(ler)
BOYD WHA 0 MAIGRET (L)
DUBE MOORS (L)(BWR)
JTELLO (ltr)
ENVIRO SERVICE (L) vd)EYOUNG(L)(PWR)(ltr),dOUSTON HULLER SHEPPARD (E)
INFO SKOVHOLT (L) 440VAK DICKER SMITH (L)
C. MILES P. COLLINS vROSS KNIGHTON TEETS (L) v1PPOLITO dOUNGBLOOD(ltr)RADE (E)
REG OPR sTEDESC0 (Itr)
REGAN WILLIAMS (E)
FILE & REGION (3) vLONG PROJECT LDR WILSON (L)
MORRIS A.AINAS
/Miraglia STEELE PAR 0YA HARLESS vv0 LIBER EXTERNAL DISTRIBUTION
),/3 v1 - LOCAL PDR Midland, Mich.
v1 - DTIE(ABERNATHY) v(UK)(2)(IZ3-NATIONAL LAB'S ANL 1-PDR-SAN /LA/NY A - NSIC(BUCHANAN) vi-ASLBP(E/W Bldg,Rm 529) d-GERALD LELLOUCHE 1 - ASLB(YORE /SAYRE/
1-W. PENNINGTON, Rm E-201 GT BROOKHAVEN NAT. LAB WOODARD/"H" ST.
1-CONSULTANT' S 1-AGMED(Ruth Guss=an) vi6 - CYS ACRS MXXXXDtXX SENT TO LIC. ASST.
NEWMARK/BLUME/AGBABIAN RM-B-12 7,- GT.
11-23-73 GOULBOURNE l-GERALD ULRIKSON...ORNL l-RD.. MULLER..F-309 G7
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