ML19337A656
| ML19337A656 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 09/24/1980 |
| From: | Bradley E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19337A657 | List: |
| References | |
| NUDOCS 8009290378 | |
| Download: ML19337A656 (4) | |
Text
5 PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 rDwAno o. BAuta. Jn.
"o'GN=YLbNsEL AN (2151 e4140o0 EUGENE J. BRADLEY AssoCsATE GENERAL COUNSEL DON ALD BLANKEN xT,."x^NfLt September 24, 1980 E. C Y. H. M AHER CORNELL Assas ANT GEN NAL COUNSEL LDWARO J. COLLEN. JR.
JOHN F. KENNEDY. JR.
AssasTANT COUN4EL Mr. Darrell G. Eisenhut, Director Division of Licensing Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D. C.
20555 Re:
Limer.ek Gener; ting S tation Units 1 and 2 Docket Nos. 50-352 and 50-353
Dear Mr. Eisenhut:
Transmitted herewith for filing with the Commission is Amendment No. 24 to Philadelphia Electric Company's Application in the above-captioned matter.
This filing consist.s of three originals and 37 copies of the Amendment and 75 copies of revised pages to be inserted in the Limerick Preliminary Safety Analysis Report.
A summary description of the revisions to the Limerick Preliminary Safety Analysis Report which are being made by this Amendment is provided in Attachment A to this i
letter.
Very truly yo y
s k
y
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Euge e J. Bradley EJB:mk Enclosures 8009290 2 3
ATDGMENT A SLMGRY DESCRIPTICN CF REVISIGS.9DE BY AME2DE7f NO. 24 TO LICENSE APPLICATICN LIMERICK GENEPATING STATICN, UNITS 1 AND 2 he Applicant has and continues to base acceptance of concrete en crxtpressive strength tests in accordance with Section 4.1.4 of ACI 318-71.
Amendment No. 24 to Philadelphia Electric Capany's License Application for Iiwrick Generating Station, Units 1 and 2 revises the Prelirirary Safety Analysis Peport to clarify the basis for the specified cmpressive strength testing of concrete as follcws:
1.
For 4000 psi or less concrete, accepce shall be based on ccrcpressive strength testing performed at 28 days.
2.
For 5000 psi concrete (D-Mix), accepce shall be based en ccxrpressive strength testing performed at 90 days.
In the production of 5000 psi concrete (D-Mix), the specified usessive strength at 28 days has not always been attained despite rigarcus efforts to identify and correct the specific cause. All concrete, regardless of the design strength, uses the same materials. Ecwver, only the D-Mix exhibits the slower strength gain characteristic.
S e applicant initiated regular 90-day a:2rpressive strength testing in l
early 1978, while retaining 28 day testing as the basis for acceptance j
l of D-Mix concrete. Since that time, all D-mix placemnts have exceeded 5000 psi empressive strength when tested at 90 days.
- In cases where the D-Mix concrete did not attain the specified 5,000 psi at 28 days nonconfonrance reports were written.
For apprcxitrately 95%
of the placements covered by these ncnconfonrance reports, the actual cmpressive strengths at 28 days exWM the required design strengths.
For these placments the more conservative forrula for detenrining the allcwable shear stress in Section 11.4.1 of ACI 318-71 was used when a higher allowable shear value using the fon:ula in Section 11.4.2 of ACI 318-71 is perritted.
The few placenents which did not develcp 28 day strengths in excess of the required design strengths did develcp c' average cm pressive strength of 5500 psi at 90 days which is in exces.; of the design requirenent.
The Applicant's experience and the literature indicate that the ccrrpressive strength of concrete increases continually and substantially after 90 days.
Figure 23 of reference 1 shcws that for Type II cee nt, which is used at the Limerick jobsite, the increase in strength frm 90 days to one year is approximately 13%, and frm 90 days to 5 years is approxiIrately 23%. Full design loading of structures incarporating D41ix concrete will not occur until long after 90 days following plac ment.
The above facts da:cnstrate that the acceptance of I>-Mix concrete based on cmpressive strength tests performed 90 days after placment provides assurance that (1) the required design strengths have been achieved and (2) when full design loadings are i:rposed on the structure, an additional Irargin of safety will exist. 'Ihe acceptance of D-Mix concrete based en 90 day c mpressive strength test results is, there-fore, considered to be both justified and conservative.
o 4 Section 4.1.4 of ACI-318-71 pemits the acceptance of ccncrete tested at ages other than 28 days; therefore the acceptance of D-Fix concrete based on 90 day cxmpressive strength test results is consistent with the Applicant's ccuritznent to ACI-318-71.
Refererres 1.
Bureau of Reclamation Concrete Manual, Eighth Edition U.S. Departm nt of Interior,1975.
1 HDH/mtk 6/1 1
..s e
BEFORE THE UNITED STATES NUCLEAR REGUIATORY COMISSION In the Matter of Docket Nos.
50-352 PHIIADELPH14 ELECTRIC COMPANY 50-353 AMENDMENT NO. 24 10 LICENSE APPLICATION OF PHIIADELPHIA ELECTRIC COMPANY LIMERICK GENERATING STATION UNITS NO. 1 and 2 Edward G. Bauer, Jr.
Eugene J. Bradley 2301 Market Street Philadelphia, Pennsylvania 19101 Attorneys for Philadelphia Electric Company 80092903 0
..o BEFORE THE UNITED STATES NUCLEAR REGULATORY COMMISSION In the Matter of Docket Nos. 50-352 PHILADELPHIA ELECTRIC COMPANY 50-353 AMENDENT NO. 24 TO LICENSE APPLICATION OF PHILADELPHIA ELECTRIC COMPANY Pniladelphia Electric Company hereby amends its Application in the above-entitled proceedings by making the deletions, substitutions, and additions to the Preliminary Safety Analysis Report shown on the document entitled " LIMERICK GENERATING STATIONS, UNITS 1 and 2, AMENDMENT 24, PSAR FAGE REVISIONS" dated August, 1980, filed herewith and made a part hereof.
Respectfully submitted, PHIIADELPHIA ELECTRIC COMPANY By Senior Vice Pfesident
\\
... s.
COMMONWEAL.TH OF PENNSYLVANIA ss.
COUNTY OF PHILADELPHIA V. S. BOYER, being first duly sworn, deposes and says:
That he is Senior Vice President of Philadelphia Electric Company, the Applicant herein; that he has read the foregoing Amendment and knows the contents thereof; and that the statements and matters set forth therein are true and correct to the best of his knowledge, information, and belief.
y C/
Subscribed and Sworn to S
before me this A 5 day of September, 1980.
i t
hb s
No'ta ry Pu6 iT elf' BETH H. 00k NoMbfic, PNta, Phita. Co.
Mrnmission Empives Jan.3% 1982 i
i
CERTIFICATE OF SERVICE I certify that service of the foregoing Amendment No. 24 was made upon Mr. Richard K. Allebach, Chairman of the Board of Supervisors, 301 Royersford Road, Royersford, Pennsylvania 19468; and Mr. Thomas M. Gerusky, Director, Office of Radiological Health, Department of Environmental Resources, P. O. Box 2063, Harrisburg, Pennsylvania 17105; by mailing a copy thereof via first-class mail, postage prepaid and properly addressed, this 24th day of September, 1980.
/l
/
EugeneJ.Bradie4 Attorney for Philadelphia Electric Company I
f l
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LIMERICK GENERATING STATION g
UNITS 1 & 2 O
AMENDMENT 24 PSAR PAGE REVISIONS The following PSAR pages are to be inserted into your copy of i
the PSAR.
These pages are either replacements or new pages as indicated below:
Delete Substitute Volume 2 Page 5.2-13 Page 5.2-13 (dated August 1980)
Page 5.2-16 Page 5.2-16 (dated August 1980) l 1
I 1
f O
I i
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8009290 94L a
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5.2.5 Materials and Materials Testing U
Pour basic materials systems make up the primary containment:
a.
Concrete and reinforcing steel for the base slab, cylindrical-conical walls and diaphragm slab.
b.
Steel plate for the liner.
c.
Steel for the head, penetrations, and their anchorages.
d.
Structural steel for support of floor and platforms.
Detailed specifications and working drawings for these materials and their installation are of such scope as to assure that the quality of work is commensurate with the necessary integrity of the primary containment.
5.2.5.1 Materials 5.2.5.1.1 Concrete Concrete for the primary containment has a specified compressive strength of 4,000 psi at 28 days.
l a.
Cement is Type II, as specified in " Standard Speci-p) fications for Portland Cement", ASTM Designation
(_
C-150, and is tested to comply with ASTM C-114.
b.
Aggregates will conform to ASTM Designation C-33 except for the gradation of the high density aggregates which will be well graded to produce a workable mix that meets all shielding requirements.
c.
Water for mixing concrete is clean and free from any deleterious amounts of acid, alkali, salts, oil, sediment, or organic matter.
d.
Admixtures shall conform to ASTM C-260 for air entraining agents, and ASTM C-494 for water reducing agents.
e.
Concrete mixes are designed in accordance with ACI 613, using materials qualified and accepted for this work.
Trial mixes are tested in accordance with applicable ASTM CoCes as indicated below:
5.2-13 August 1980
o f
LGS 5.
Section 3.5.l(a) of the 1974 Supplement to ACI 318-71 applies
(~)
in lieu of Section 3.5.l(a) of ACI 318-71.
V 6.
The following requirements apply in lieu of the first sentence of Section 4.1.4:
P'c for 5000 psi design strength concrete shall be based on tests of 90 days.
F'c for all other concrete design strengths shall be based on 28 day tests.
7.
The following requirements apply in lieu of the last sentence of Section 4.3.1:
Each strength test result shall be the average of two cylinders from the same sample ter.ted at 28 dris for concrete with a design strength of 4000 psi or less and at 90 days for concrete with a design strength of 5000 psi.
c.
ACI 347 Recommended Practice for Concrete Formwork.
d.
ACI 306 Recommended Practice for Cold Weather Concreting.
ACI 605 Recommended Practice for Hot Weather Concreting.
e.
f.
ACI 613 Recommended Practice for Selecting Proportions for Concrete is used except that the following recom-mended laboratory tests on pages 211-14, 211-15
(}
and 211-16 are not used:
Pineness of portland cement by air permeability apparatus - ASTM Designation C 204 Specific gravity of hydraulic cement - ASTM Designa-tion C 188 Percentage of shale in aggregates - AASHO Designa-tion T 10 Alkali reactivity, potential, of cement - aggregate combinations - ASTM Designation C 227 Air content (volumetric) of freshly mixed concrete -
ASTM Designation C 173 Air content of fresh concrete by pressure methods (Washington-type meter) - Bureau of Reclamation Concrete Manual, Designation 24 Air content of freshly mixed concrece - Corps of Engineers Handbook for Concrete and Cement Designa-tion CRD-C 41 Laboratory concrete mixing - Bureau of Reclamation 7j Concrete Manual, Designation 28
(
5.2-16 August 1980