ML050840060

S/G Nozzle Dam Removal Pre-job Brief

ML050840060
Person / Time
Site:	Point Beach
Issue date:	03/21/2005
From:	- No Known Affiliation
To:	Office of Nuclear Reactor Regulation
References
FOIA/PA-2004-0282
Download: ML050840060 (5)

Text

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• 2, C4,f -i 6 af S/G Nozzle Dam Removal F re-job Brief efJ,&v &szl/c.

1. Introduction (Sr Manager - Jim Schweitzer)

a. Scope of Job

• Big Picture/ what we are doing and why Removing Nozzle Dams Plant in reduced inventory - IP'IE/High Risk high dose rates personnel safety issues (confined space/engulfment I.

• Management Expectations

1. Conservative Operating Philosophy

2. Procedure Adherence

• Procedures/Work plans in effect

1. HPIP 4.58 Issuance of Respiratory Equipment.

2. PBF 4234. Respirator Issue Record f

3. WO 0400042, IHX-OOIA Nozzle Dam Removal

4. WO 0400043, 1HX-OOlBScientech Procedure 83A. 1564, Rev 6, Steam Generator Nozzle Dam Installation and Removal, Test, Operation and Maintenance Manua

5. HPIP 4.51.3, Airline Respiratory Protection Eq ipment

6. HP 2.5, Radiation Work Permits

7. NP 8.4.9, Hose Control

8. PBF 4107a, Bubble Hood Air Supply Pressure Record

9. NP 1.2.6 Infrequently Performed Tests or Evolution s

10. NP 1.1.7, Managing Work Activity Risk

11. RMP 9391, Connection of Unit I Nozzle Dam Cont rol Console Remote Alarms to I C20 is i,8 b. Lessons Learned/OE it c. Remind everyone that if anyone during in the brief makes the statei nent: "I think" or "I believe," we must challenge their assumptions. Their inaccurate mental model could create a problem on the job. Use Qualification, Validation, and Verification (QV&V) to eliminate assumptions.

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2. Radiological Conditions Precautions - Carberry/Reiff/Peroutka

a. ALARA /Radwaste Considerations

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• High Exposure job - minimize time in the bowl; helpers hould minimize time in shine from bowl. Safety and correct removal are even more important than speed.

• Irradiated material is a possibility; don't pick up anything inside the channel head without RP permission. The object may be highly radioactive. Numerous industry over expo ures have occurred in 10 to 30 seconds of handling irradiated components. (Information Notice 90-47)

b. RWP - Separate RP brief (PBF - 4194a)

3. Work Order! Procedure Summary - Contract Liaison (Kiesper) o Initial Conditions o Work Plan - Interfaces with other procedures o Self Checking i

i o Independent Verification and Concurrent Checks i

I-Hot H leg first I

o Overall effect on plant/systems and expected major alarms I . If notified by the control room or any containment evacuation a arms, put job in safe condition and exit containment.

o Operating Procedures - OP 4-F 0 Contingency plans - If bolt won't come out without being disassembled stop the job.

o Stop Job Criteria

Low air pressure

• Any unexplained anomaly

• Significant Water o FME Closeouts/ covers

4. Energy Sources/ Danger Tagging - Klesper

a. De-energized equipment, pressurized, de-pressurized systems /boun laries

• Nozzle dam console must be unprotected and the caution ags removed.

b. Protected Worker Log I.

• All Scientech personnel on the platforms

c. Walkdown II

• Ladders

d. Notes & Cautions

• Single chain for hand rail i

5. Communications/ Command and Control Protocol (Hennessy)

a. Command and Control

• Contractor Liaison - prior to beginning work on the platf rm

• RP Supervisor when workers are on the platform

• Contractor liaison once workers have cleared the platfornJ Is

b. Importance of elevating concerns/problems to Contactor Liaisot

• When any abnormal event has occurred.

• When any part of the evolution is delayed by 15 minutes alhd the reason why

c. Critical Handoffs

d. Communications

• The steam generator nozzle dam removal event will be communicat l d to the OCC by the Program Engineering Supv.

• Use of three-way communication outside the Manway is required dtring directions or following the work plan. Informational communications need not be 3-way.

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• Do not be afraid to interrupt non-essential conversations.

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• Clear and concise commands are required.

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• The RP tech timing the jump should announce when 30 seconds ren lain. The RP tech should not count down continuously as this t is distracting to the jumpers. At 10 seconds, the jumpers should be t,6ld, "10 seconds, get out."

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• If you lose communications while in the steam generator, GE1 bOuT.

• To stop the job, it is imperative that the words "STOP, STOP, STOI I"be used. In the case of the personnel in the channel heads II should be told to "GET OUT".

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t 6. Safety/HazardslPcrmits Hennessy f

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I Plant operation, power generation, nuclear safety, trip avoidance The removal will be staged as follows:

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• A hot leg nozzle dam; I

• A cold leg nozzle dam I

• B hot leg nozzle dam.

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B cold leg nozzle dam 4

o During the point of the outage at which we are at, 45 days from shutdow'n, initial RCS temperature<90 0 F and after i

replacing 1/3 of the core, the time to reach 200'F is conservatively estimiated at 90 minutes. If both trains of R1HR lost, t

I Operations has Shutdown Emergency Procedures which alloA them to fiill the RCS and RHR suction line and restore II core cooling. i il I o When removing the Cold Leg nozzle dam, it is possible to hate a decrea Se of approximately 2 inches in the RCS level I o Transient Combustibles PBF-191 la (Communication cable/airhoses are covere d) t I

i Personnel / PPE (Sipiorski)

Confined space procedure; responsibilities PBF-0038 I i

i Confirm everyone legal for safety related work (16124, 2I44, 72 consec:utive) 0 i

We will not spray down jumpers to assist in accessing the channel heat i

t 1ght goes out, have the spare sent in. If the spare Verify that the light is lit prior to entering the channel head. If Hi does not work or can't be found, GET OUT.

If you are not comfortable with the status of your breathing air, dlo not continue. If the breathing air supply is interrupted, GET OUT.

If breathing air is lost, RP should. perform an emergency cut out.

If you lose communications, GET OUT. I Be aware of the symptoms of heat stress. If you think tyou are su ffering from heat stress, GET OUT.

The nozzle dam sections are heavy. Remember to use proper lifiring techniques (as allowable by the space configuration.).

7. Identify Critical Steps/ Error Likely Situations/Defense Barriers (Hennlessy)

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• Task demands (Time pressure); more important to be safe!

• Distractive or poor environment

• Work stoppage (termination) Criteria

1. Attachment A in work plan I

8. Other (Hennessy)

a. Foreign Material Exclusion

• VERY HIGH level of FME control is required. Any loss of foreign material (tools, parts, etc.) SHALL be reported immediately to the Contract Liaison

b. Review OE Included in Work Package

c. Individual Responsibilities & Qualifications

• Ensure all had JIT Training l

1. Scientech - responsible for removal of nozzle dams

a. Tech A - removal technician

b. Tech B (2) - platform support technicians

c. Tech C - located at control console

2. RP - prepares SG channel head for entry

3. Confined Space Attendant - when nozzle dams are removed; Channel head becomes a permit required confined space. RP Tech on 8 ft level will serve as Attendant

4. RP Supervisor - controls evolution while workers dn platform

5. Contract Liaison - Responsible for event executioni

6. Operations - controls water level in the RCS

7. Rescue Team - located at 8ft; responsible for executing confined space rescue if required

8. Operations - responsible for removing tags, protected equipment, handoffs for evolution

9. Westinghouse - provides communication and video equipment/operators

10. Maintenance - responsible for reinstalling manwayA

d. Post-Job Debrief Schedule (PBF-9218) i

.(rill in time and location prior to brief)

¢ eC. Address Concerns/Questions - Specifyl