ML17317B409
| ML17317B409 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 07/27/1979 |
| From: | Dolan J INDIANA MICHIGAN POWER CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| AEP:NRC:00213A, AEP:NRC:213A, NUDOCS 7908060345 | |
| Download: ML17317B409 (10) | |
Text
REGUlATORY
'FORMATION DISTRIBUTION SY
=M (BIDS)
ACCESSION NBR:7908060305 DOC ~ DATE; 79/07/27 NOTARIZED:
YES DOCKET FACIL:50 315 Donald C,
Cook Nuclear Power PlantP Unit 1P Indiana L
050 50-316 Donald C,
Cook Nuclear Power Planti Unit 2P Indiana L
05000316 AUTH BYNAME AUTHOR AFFILIATION DOLANPJ,ED Indiana 8 Michigan Power Co ~
REC IP ~ NAME RECIPIENT AFFILIATION DENTONPH ~ RE Office of Nuclear Reactor Regulation
SUBJECT:
Forwards addi info re spent fuel storage capacity expansion program.
DISTRIBUTION CODE:
A0010 COPIES RECEIVED:LTR +
ENCL J.
SIZE:
TITLE: GENERAL DISTRIBUTION FOR AFTER ISSUANCE OF OPERATING lIC NO ES; ~
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RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME'TTR ENCL ID CODE/NAME LTTR ENCL ACTION:
05 BC g~ (
7 7
INTERNAL:
REG I
1 15 CORE PERP BR 17 ENGR BR 19 PLANT SYS BR 21 EFLT TRT SYS GELD EXTERNAL: 03 LPDR 23 ACRS 1
1 2
2 1
1 1
1 1
1 1
1 1
0 1
16 16 02 NRC PDR 14 TA/EDO 16 AD SYS/PROJ 18 REAC SFTY BR 20 EEB 22 BR INKNAN 04 NSIC
't l TOTAL NUMBER OF COPIES REQUIRED:
LTTR 3(9 ENCL SP
INDIANA II MICHIGAN POWER COMPANY P. O. BOX 18 BOWLING G R E EN STATION NEW YORK, N. Y. 1O004 Donald C.
Cook NucleaT Plant Unit Nos.
1 and 2
Docket Nos.
50-315 and 50-316 License Nos.
DPR-58 and DPR-74 Spent Fuel Storage Capacity Expansion Program Nr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Comission Washington, D.C.
20555
Dear Nr. Denton:
July 27, 1979 AEP:NRC:00213A
'Rl65'II WING BK IltI Attachment 1 to this letter provides additional information on the spent fuel storage capacity expansion program for the Donald C.
Cook Nuclear Plant.
This information was requested from us on a "facsimile telecopied to our offices on July 18, '1979.
Very truly yours, John E. Dolan Vice President Sworn an/ subscribed bo before me this2-7 day of July, 1979 in New York County, New York Notary Public CC:
C. ROBERT ROLL IIOTAitY PUBLIC, STATE OF NEW YORK No. 41-3332II50 Quelitied in Queens County R.
C. Cal len gQQfQjffion E,pit I4Qfeh 3O
$9 p I.
G. Charnoff D. V. Shaller - Bridgman R.
W. Jurgensen P.
W. St'eketee R. J. Vollen R.
Walsh Ca V90806Q~
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ATTACHMENT 1
AEP: NRC '0213A UESTION No.
14 Provide a sketch of the first mode vibration which results from the SAP IV Seismic t'lodel of FIG. 3.6.1.
Discuss why, for this mode, the participation factors are so small.
RESPONSE
A plot of the first vibrational mode shape is presented in Figure 3.6.14.
The mode shape plot is presented as a plan view of the top of the rack structure.
As can be seen from Figure 3.6.14 this mode shape constitutes a diagonally symmetrical "diamonding" distortion at the top of the rack.
Since this mode shape is syranetrical all inertial and stiffness forces are balanced within the structure.
There is, therefore, a negligible response to seismic excitation imposed at the pool floor/rack base interface.
0O
FIGURE 3.6.14 tlode Shape 1
Plan View On Top Of Rack tlodule
AEP: NRC: O0213A UEST ION No.
15 The NRC position paper entitled, "Review and Acceptance of Spent Fuel Storage and Handling Applications" lists load combinations in Section 6, "Structural Acceptance Criteria".
These loads combinations include two which are not mentioned in Table 3.6.1 of your April 16, 1979 Spent Fuel Pool Transmittal.
They are:
1.
D+L+T +E 0
2.
D+L+T +E a
Discuss your reasons for omitting these combinations.
RESPONSE
The apparent omission occurred because of different definitions of live loads.
The NRC position paper references Section 3.8.4 of the NRC Standard Review Plan for definitions where, under Normal Loads, L is defined as "Live loads or their relaxed internal moments and forces including any movable equipment loads and other loads which vary with intensity and occurrence, such as soil pressure."
Using this definition the fuel weight would, therefore, be defined as a live load.
In Section 3.6.2 of our April 16, 1979 submittal dead load, D is defined as "Dead load of fuel module structure and stored fuel".
The following load combinations are, therefore, equivalent:
D. C.
Cook 4/16 79 Submittal NRC Position Pa er D +
E D+T
+E 0
0+T
+E a
D+T
+E a
D + L +
E 0 + L + T
+
E 0
D+L+T +E a
D+L+T
+
E a
From the foregoing it i's concluded that the load combinations used in the D. C.
Cook fuel storage rack design are in conformance with the provisions of the NRC position paper.
uestion No.
16 Indicate if welding is performed to connect the racks and the pool liner.
If so, indicate the applicable code used to qualify the welder and welding procedure.
~Res ense No welding will be done to connect the racks to the spent fuel pool liner.
AEP: NRC: 00213A
~
~
~
uestion No.
17 Discuss the inservice surveillance plans, if any, that you have developed to assure long term safety of the fuel rack system.
~Res ense The inservice surveillance program to insure the integrity of the Boral material was discussed in our submittal of November 22, 1978, Section 3.4.2.
The spent fuel racks are passive structures which are protected'from impact damage by restrictions on the movement of heavy loads over the pool.
The racks require no maintenance since they have no moving parts and the noncorrosiveness of stainless steel is well documented.
Me have not identified any additional surveillances which would be required under normal operation to insure the long term safety of the proposed fuel rack structure.
Normal surveillance and routine maintenance will continue to be performed on the spent fuel cooling and water purification. systems independent of the proposed modifications to the spent fuel rack storage capacity.