ML19347F783

Forwards Response to NRC 801222 Ltr Re Control of Heavy Loads

ML19347F783
Person / Time
Site:	Farley
Issue date:	05/15/1981
From:	Clayton F ALABAMA POWER CO.
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
NUDOCS 8105260290
Download: ML19347F783 (4)

Text

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..- Memng h Alabama Power Company 600 North 18th street Post Office Box 2641 Birmingham. Alabama 35291 Telephone 205 783-6061

r. L Clayton. Jr.

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Alabama Power the southem electnc system kay 15, 1981 D

Docket No. 50-348 did No. 50-364 ) o r

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Q *N 2p 788 Mr. Darrell G. Eisenhut, Director Division of Licensing t,1j di Office of Nuclear Reactor Regulation ',

. /. ,,'#' % % g eg/g !- s U. S. Nuclear Regulatory Commission Washington, D. C. 20555 h ,f , .,

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Dear Mr. Eisenhut:

In response to your December 22, 1980 letter, subject " Control of Heavy Loads," Alabama Power Company submits the enclosed response. ,

If you have any questions, plecse advise.

Yours very truly, h

F.LfClayton,'r.

FLCjr/ JAR:rt i

Enclosure cc: Mr. R. A. Thomas Mr. G. F. Trowbridge Mr. J. P. O'Reilly Mr. E. A. Reeves l Mr. J. O. Thoma Mr. W. H. Bradford

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, .- ENCLOSURE l RESPONSE TO STAFF POSITION-IfiTERIM ACTIONS FOR CONTROL OF HEAVY LOADS

1. Staff Position -

' Safe load paths should be defined per the guidelines of Section 5.1.1(1).

NUREG-0612, . Section 5.1.1(1):

I Safe load paths should be defined for the movement of heavy loads to

, __ minimi.ze the- potential for heavy loads, if dropped, .to impact irradiated fuel in the reactor vessel and in the spent fuel pool, or to impact safe i shutdown equipment. The path should follow, to the extent practical, structural floor members, beams, etc., such that if the load is dropped, the structure is more likely to withstand the impact. These load paths-should be defined in procedures, shown on equipment layout drawings, and clearly marked on the floor ir. tne area where the load is to be handled.

Deviations from defined load paths should require written alternative procedures approved by the plant safety review committee.

Response

a. Inside Containment:

Detailed safe load paths have been developed for the reactor head, reactor upper internals, and RV missile shield. The safe load path-ways for the reactor coolant pumps, RCP hatch covers and polar crane load block were established by determining exclusion areas over which these loads are not pemitted. The reactor vessel has not been I included in a safe load path pending completion of a review by Westinghouse. This review will be incorporated into Alabama Power Company's June 22, 1981-response to NUREG-0612.

The led paths will be defined.in plant procedures. The placement of load path markings on the floor would serve no useful purpose as the floors are generally covered with protective coverings during outages when the crane is in use.

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Deviations from the safe load pathways as defined in the plant procedures will require the same approvals as any other procedural deviation.

b. Auxiliary Building:

All floors underneath the auxiliary building crane and monorail hoists a;9 capable of withstanding the drop of their design loads l without precluding safe shutdown capability provided certa'n ,

j lifting height limitations are observed. The definition of the safe load pathways for these areas.is limited to a lift height restriction. The only exception to this identified during Alabama 1

Power Company's review of NUREG-0612 is that, if the Demineralizer l Hatch Monorail Hoist was used during normal plant operation and dropped a hatch cover through the open hatch area at elevation 155',

the falling hatch could potentially break through or damage the floor I

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'.- Risponse to Staff Position Interim Acticns for Control of H:avy Loads Page 2

• at elevation 139' causing damage to the lower floor elevations. The probability of the demineralizer cover dropping through .the open hatch and damaging the lower elevations is remote; however, Alabama Power Company will revise plant procedures to minimize the time the hatch cover is positioned over the demineralizer during lifting operations.and require special precaution as described below.

The load paths will be defined in plant procedures. The placement -

of load path markings on the floor would serve no useful purpose since the restriction on movement of heavy loads in the Auxiliary

Building is height above the floor rather than the path the load l will travel.

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2. Staff Position:

Procedures should be developed and implemented per the guidelines of -

Section5.5.1(2).

NUREG-0612,Section5.5.1(2):

Procedures should be developed to cover load handling operations for heavy loads that are or could be handled over or in proximity to irradiated fuel or safe shutdown equipment. At a minimum, procedures should cover handling of those loads listed in Table 3-1 of this report. These pro-cedures shodd include: identification of required equipment; inspections y and acceptance criteria required before movement of , load; the steps and proper sequence to be followed in handling the load; defining the safe load path; and other special precautions.

l Response:

Alabama Power Company will develop procedures to cover the load handling operations for those loads listed in Table 3-1 by October 1, 1981. These -

procedures will meet the requirements of NUREG-0612, Section 5.1.1(2).

3. Staff Position:

! Crane operators should be trained, qualified and conduct themselves l per the guidelines of Section 5.1.1(3).

l NUREG-0612,Section5.1.1(3):

Crane operators should be trained, qualified and conduct themselves in -

accordance with Chapter 2-3 of ANSI B30.2-1976, " Overhead and Gantry Crane:;. "

Response

Operator training will be revised to include the basic requirements of ANSI B30.2-1976 by October 1, 1981.

4. Staff Position:

Cranes should be inspected, tested, and maintained in accordance with the guidelines of Section 5.1.1(6).

,_ . R6sponsa to Staff P:sition Imt rim Actions fcr Control of Heavy Loads Page 3 NUREG-0612, Section 5.5.1(6):

The crane should be inspected, tested, and maintained in accordance with Chapter 2-2 of ANSI B30.2-1976, " Overhead and Gantry Cranes," with the exception that tests and inspections should be performed prior to use where it is not practical to meet the frequcacies of ANSI B30.2 for periodic inspection and test, or where frequency of crane use is less than the specified inspection and test frequency (e.g., the polar crane inside a PWR containment may only be used every 12 to 18 months during refueling operations, and is generally not accessible during power operation. ANSI B30.2, however, calls for certain inspections to be performed daily or monthly. For such cranes having limited usage, the inspections, tests, and maintenance should be performed prior to their use.)

Response

Crane inspection, testing, and maintenance requirements will be revised to incorporate the basic requirements of Chapter 2-2 of ANSI B30.2-1976 by October 1, 190'. As noted in NUREG-0612, certain frequencies of tests cannot be met.due to inaccessibility.

5. Staff position:

In addition to the above, special attention should be given to procedures, I ___ equipment, and personnel for the handling of heavy loads over the core, such as vessel internals or vessel inspection tools. This special review should include the following for these loads: (1) review of procedures for installation of rigging or lifting devices and movement of the load-to assure that sufficient detail is provided and that instructions are l clearandconcise;(2) visual inspections of load bearing components of cranes, slings, and special lifting devices to identify flaws or de- .

ficiencies that could lead to failure of the component; (3) appropriate repair and replacement of defective components; and (4) verify that the crane operators have been properly trained and are familiar with specific procedures used in handling these loads, e.g., hand signals, conduct of operations, and content of procedures.

Response: 9 i

(1) The plant procedures will be reviewed as part of the update required I in items 2, 3, and 4 above.

(2) Visual inspections are routinely performed at plant Farley prior to all lifts. .

(3) Defective components are routinely repaired or replaced as appropriate.

(4) Crane operators will be trained per basic requirements of ANSI B30.2-1976 and plant procedures by October 1,1981.

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