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}; MISSISSIPPI POWER & LIGHT COMPANY:

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Helping Build Mississippi"' ""'" P. O. B O X 164 0 J A C K S O N, MISSISSIPPI 39205

'NUCLEAR pro 0UCTioN DEPARTMENT ft).

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U. S. Nuclear Regulatory Commission RECgygD'.7Office of Nuclear Reactor Regulation d'

Division of Licensing 2 M.9 Oj -

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g 88 eat g,Washington, D. C. 20555 *~-

Attention: Mr. Darrel G. Eisanhut, Director% O

Dear Mr. Eisenhut: O 6

SUBJECT: Grand Gulf Nuclear StationUnits 1 and 2Docket Nos. 50-416 and 50-417File 0260/16360Control of Heavy LoadsAECM-82/17

This letter is being sent to you to supply certain corrections to theHeavy Load Report submitted to your office with AECM-81/427 datedNovember 23, 1981. In that report our plant specific definition of a heavyload was changed from 750 pounds to 1140 pounds or from the weight of achanneled fuel assembly to the weight of a channeled fuel assembly plus itsassociated handling tool as defined in NUREG-0612.

The change was made in Footnote 1 of Table 4 on page 18 and in theproposed Technical Specifications for the fuel storage fuel pools, 3/4.9.7,and Jib crane, 3/4.3.13. However 1140 pounds is greater than the ratedcapacity of the Jib crane, (15 ton), therefore since the limitation to 1140pounds is meaniagless, the latter technical specification is being deleted.Reference to the proposed Jib crane Technical Specification is also beingdeleted on page 10.

Two more references to the heavy load definition have been changed. Onthe attached replacement to page 12 the words "and its associated handlingtool" are added to Footnote (1) and on the attached replacement to page 15 inthe New Fuel Bridge Crane paragraph, 750 has been changed to 1140 in line six.

Attached are the required replacement pages. Instructions for revision ofthe Grand Gulf six months Heavy Loads report are as follows:

Remove Replace With

Page 10 Page 10-Rev. 1Page 12 Page 12-Rev. 1Page 15 Page 15-Rev. 1Page 18 Page 18-Rev. 1Technical Specifications f3/4.9.7 3.4.9.7 Rev. 13/4.9.13 (2 pages) delete

8203010282 B20225 Member Middle South Utilities SystemPDR ADOCK 05000416s m

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AECM-82/17MISSISSIPPI POWER & LIGHT COMPANY Page 2

If you have any questions please advise.

Yours,truly,~ W

'L. F. DaleManager of Nuclear Services

PJR/JDR:phAttachments

cc: Mr. N. L. StampleyMr. R. B. McGeheeMr. T. B. ConnerMr. G. B. Taylor

Mr. Richard C. DeYoung. DirectorOffice of Inspection & Enforcement .

U. S. Nuclear Regulatory CommissionWashington, D. C. 20555

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The Spent Fuel Pool Cooling Heat Exchanger Monorail may be excluded fromconsideration because there is no safe shutdown equipment below or in proximity to

this monorail. The monorail only operates at one end of the fuel pool coolers and

connot'corry a load over the coolers..

The Jib Crone in the containment may be positioned at any of three differentlocations along the west side of refueling canal and is used for handling smaller loadsin this oreo near the in-containment fuel storage rocks. The Jib Crone in theauxiliary building may be positioned at any of four locations along the spent fuel pool.

These jib crones are used for handling channel assemblies, control rods, guide tubes,

and other loods that are lighter than a fuel assembly plus its handling tool. e

iSeparate small crones (6-fon capacity) are located above each Diesel Generator Unit

to assist in servicing these units. The crones are only used when the diesel has been

removed from service and requires sorne maintenance or repair. Since the onlyequipment in a diesel generator compartment is associated with that diesel, a load

drop from one of these crones would therefore not cause operable safe shutdown

equipment to become inoperable.

Finally, the monorails for the Standby Service Water Pump Houses are used forremoving roof hatches to provide access for removal of standby service water pumps

or motors. Two pump houses are provided, each containing pumps for only one safety

division. The monorails would only be used for servicing equipment ihot is removed

from service for maintenance or repair. Therefore, a load drop from one of thesemonorails would not cause operable safe shutdown equipment to become inoperable.

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Rev. I 10

2/10/82 |

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TABLE 3 (continued)

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Heavy LoadI andling Situation Safe Load Path / Procedural Actions RequiredH

Safety Class 2. Lood could be 2. Procedurally define on area over which-carried directly over spent fuel, foods shall not be corried so that if*

the reactor vessel, or safe shut- lood is dropped, it will not result indown equipment, i.e., lood con be damage to spent fuel or operable safehandled during the time when shutdown equipment or compromisespent fuel or the reactor vessel is reactor vessel integrity.exposed or safe shutdown equipmentis required to be operable andthere are no physical means (suchas interlocks or mechanical stops)available to restrict load move-ment over these objects.

Safety Class 3. Lood con be 3. See 3A and 38.corried over spent fuel or safeshutdown equpment, but the fuelor equipment is not directlyexposed to the load drop, i.e.,intervening structures such asfloors provide some protection.

Safety Class 3A. 3A. No load travel path is required at thisPreliminary evaluation indicates time. General precautions limitingthat intervening structures will locd travel height is prudent.protect spent fuel or safe shut-down equipment.

Safety Class 38. 38. Define safe load paths that follow, toPreliminary evaluation con not the extent practical, structuro! floorconclusively demonstrate that members. Limit food travel heightintervening structures will to minimum height practical.protect fuel or safe shutdownequipment.

Safety Choss 4. Load connot be 4. No safe food rath required. I

corried over spent fuel or over |

safe shutdown equipment when such I

equipment is required to beoperable, i.e, design or opera-tional limitations prohibitmovement.

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I A heavy lood is defined as a load that is greater than the weight of a channeled .jfuel ossembly and its associated handling tool.

Rev. I12

2/10/82

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SPENT FUEL CASK CRANE

The discussion regarding the Spent Fuel Cask Crone in item I indicated that this4

crone lies been designed to " Single Foilure Proof Critiero." Further, the crane" rolls do not extend over any portion of the Spent Fuel Pool. Administrative

controls limit the cask (the principal lood of interest) from being raised morethan 6 inches above the operating floor and redundant limit switches prevent the,

cask from being raised more than one foot.

Because the design of the " Spent Fuel Cask Crone" provides substantial lood

handling reliability, detailed safe lood paths were not judged to be required and

therefore none are proposed here. Nonetheless, prior to undertaking any cask

handling operations, detailed handling procedures will be developed taking into

consideration the guidelines of NUREG 0612..

NEW FUEL BRIDGE CRANE

The concern with the New Fuel Bridge Crone is the possibility of carrying loods

over spent fuel in the spent fuel pool. There are no physical or designrestrictions that prevent this crone from moving over the pool. . Accordingly, all

of the heavy loads listed in Toble 6 for this crone have been assigned to Sofetyi

Class 2. To oddress this concern, proposed Technical Specification 3/4.9.7

(ottoched) prohibits foods in excess of 1,140 lbs. from being corried over jirrodioted fuel in the spent fuel pool. Further, the plant procedure governingoperation of the New Fuel Bridge Crone includes precautions and guidancerelated to meeting this Technical Specification.

MONORAIL / HOIST FOR LPCS AND RHR"C" HATCHES

The safety concern posed by this handling system is described in the response to

item I as the potential for dropping a hatch cover or heavy piece of equipment,

onto cabling at the i19' elevation. To address this safety concern, the plant

; procedure governing lifts by this monorail / hoist system includes precautions tohoist operators that olert them to the concern and direct them to take extreme

core to avoid impacting the cabling. ,

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Rev. I 15

2/10/82. .- . - - - . . .

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TABLE 4

(continued)

APPROX. APPLICABLESAFETY WElGHT LIFT LIFTING

9LOAD CLASS (TONS) PROCEDURES EQUIPMENT'

10. RWCU Regenerative 2/3B 15 9/ Shockles and i

HX Hatches (2) Slings

i1. RWCU Non-Regenerative 2/3B 15-17 9/ Shockles andHX Hatches (3) Slings

12. RWCU Filter Demineral- 2/3B 20 -9/ Shockles andizer Hatches (2) Slings

1. A heavy load is defined as a weight exceeding the weight of a channeled fuelassembly and its associated handling tool (approximately 1,140 pounds).

2. General Maintenance Instruction,07-S-14-184," Installation and Removal of theReactor Vessel Head, Safety Related."

3. General Maintenance instruction,07-S-14-186," Installation and Removal of theReactor Moisture Separator, Non-Sofety Related."

4. General Maintenance Instruction,07-S-14-187," Installation and Removal of thePortable Refueling Shield (Cottle Chute), Non-Sofety Related."

5. General Maintenance Instruction, 07-5-14-182," Installation and Removo! of theDrywell Head, Non-Sofety Related."

6. General Maintenance instructions,07-S-14-189,"Installotion and Removal of theFuel Pool and Canal Gates, Non-Sofety Related."

7. A maintenance instruction for the installation and removal of the steam dryerhas not yet been prepared. When on instruction is prepared, it will include thenecessary detail, precautions, etc. to odequately oddress the requirements ofNUREG 0612.

8. As with the steam dryer (oddressed above), no maintenance instruction for theinstallation and removal of the Reactor Vessel Insulation Assembly hos yet beenprepared. The some conditions for procedure development and content opply asfor the steam dryer (Note 7).

9. The Maintenance instruction for Polar Crane Operation in general is opplicableto oil loads. In oddition, it governs the lif ts of all loads listed in this tobic thatdo not have special lif t procedures designated.

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Rev. I 18

2/10/82

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