ML17193A301

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Final Deficiency Rept Re Concrete Voids Behind Liner Plate in Lift 8 of Reactor Bldg Exterior Wall.Const & Insp Procedures & Engineering Design Documents Revised
ML17193A301
Person / Time
Site: South Texas  
Issue date: 02/18/1980
From:
HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML17193A302 List:
References
NUDOCS 8003060221
Download: ML17193A301 (4)
v • d • e


Text

e Commonw.h Edison One First National Plaza, Chicago, Illinois Address Reply to: Post Office Box 767 Chicago, Illinois 60690 Mr." Paul O'Connor, Project Manager Operating Reactors - Branch 5

  • U.S. Nuclear Regulatory Commission Washingtcrn D.C.

20555

Subject:

Dresden 2 Reactcrr-Turbine Building Design Parameter Verification NRC Docket 50~237 August 1,. i980 ".sg

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Reference:

  • a)

Robert ~-

Janecek letter df March 4, 1980 to D.:L. Ziemann*

Dear Mr. O'Connor:

In accordance with reference (a) Commonwealth Edison has reviewed the structural param~ter~ (i.e. axial area~, shear area§,

moments of inertia, and ma~ses) used ~h.~he 196~ Blume seismic analyses of the reactor-turbin~ bµilding complex ~t the *Dresdeh 2 Nuclear Power Plant.

Tables l through 3 compare.the structural parameters calculated using as-built drawings and curr~nt procedures -with the.same parameters calculated and used in the 1965 an*alyses.* *These* tables fulfill Cb~~onwealth Edison's committmeht of reference (~).

  • Commonwealth Edison has reviewed the impact* of using the new set of structural parameters (those caltula~ed using as-built drawings and current procedures) on the seismic response~ of the *complex.

.Ih

  • general, the responses are eq0~1 to or less than those presented in the report of the Senioi Seismic Reyiew T~am*(SSRT).

The review concluded the new set of structural p~ra~~ters r~p6rted in Tables l thru 3,. if substituted in*the dynamic modei of *the reactor-turbine building c6mplex used by the SSRT in their evaluation of Dresden 2,.wo~ld show these structures and equipment to ccintain, in ~~neral, ev~n higher margins of safety than those given in the SSRT report.

If you have any questions 6oricerning ihls ~atter please contact this office.

One (1) signed original an~ thiity-ni~e (39).copies qf this.

transmittal are provided for your use.

NPS:mnh 5463A Attachment

,' *1 Very. truly *yours,

f)/uffH Robert f. Janecek

.**Nuclear ~icensing Admiriistrator Bo~linQ Water Reactors '

TABLE 1 COMPARISON OF MASS DESIGN PARAMETERS Weight (kip)

Elevation Structure (ft-in.)

1980 1965 Value Value Reactor Building 659-3.

1, 676

.1, 466 639-0 890 890 626-0 329 329 613-0 33, 119

. 40, 974 589-0 32,480 30,352 570-0 38,757.

34,014 545-6 34,525 34,282 517-6 64,786

. 94, 592 Turbine Building 622-6 3,577 2,774 601-0 332 260 580-1 H 382 314 561-6 71,673 98,243

... r

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TABLE 2 COMPARISON OF STIFFNESS DESIGN PARAMETERS, REACTOR BUILDING Axial Area, Axial Area, Shear Area, Shear Area, Moment of Inertia Moment of ln~rtia Elevation N-S (ft 2)

E-W (ft 2 )

. N-S (ft 2 )

E-W (ft 2)

@ N-S (ft 4)

@ E-W (ft 4 )

(ft-in.)

1980 1965 1980 1965 1980 1965 1980 1965 1980 1965 198()

1965 Value Value Value Value Value Value Value Value

,Value Value Value

  • Value 659-3 107*

to 3.0 3.0 3,9 3,9 1 o7 1 o7 107 '.

639-0 639-0 101*

101**

101*

101*

  • to.

4.0 4.0 4.8 4.8 626-0 626-0 to 4.5 4.5 7.2 7.2 1 o7" 107" 1 o 7 '~

107*

613-0 613-0 to 5,640. 5,570 5,640 5,580 1,915 3,900 3, 100 3,900 53,900,000 43,476,500 6, 160,000 5,319,600 589-0 589:..0 to 5,900

.5,820 5,900 5,810 2,359 4,050 2,939 4,050 58,340,000 57,416,100 6,608,900 6,839,700 570-0 570-0 to 4,480 5,550 4,480 5,540 1, 751 3,880 2,1116 3,880 35,700,000 39,944,000 6,858,900 7,506,000 545-6 545-6 to 4,900 4,940 4,900 4,930 1,997 3,450 2,570 3,450 39,500,000 32,247,000 7,917,000 7,157,600 517-6 517-6 4,630 to 8,480 8,820 8,480 8,320 4, 159 4,630 4' 151 63,206,000 62,353,000 16,500,000 16,230,100 472-6

~Assumed va 1 ue.

TABLE 3 COMPARISON OF STIFFNESS DESIGN PARAMETERS, TURBINE BUILDING Axia.l Area, Axial Area, Shear Area, Shear Area, Moment of Inertia Moment of Inertia

.Elevation N-S (f t 2 )

E-W (ft 2 )

N-S (ft 2 )

E-W(ft2)

@ N-S ( f'tli) -

@ E-W (ft 4)

{ft-in.)*

1980 1965 1980 1965 1980 1965 1980 1965

  • 1980 1965 1980 1965 Value Value Value Value Value Value Value Value Value Value Value Value 622-6 101"'

107*

1 o11~

to 101" 8

8 128 128 601-0 601-0 101*

I o 7 '~

l o1*

  • 12.8 12.8 1071:

128 128 to 580-11!

580-1 H 107*

107*

107*

101*

to.

13.8 13.8 128 128 561-6 561-6 to 6,622 628 6,622 1,980 2,31~

1,037.4 2,711 329.7 170,780,000 77,000 20,100,000

. 858,700 513-6

>~Assumed value.

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