ML20085D251

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Change Rept 10 to Application for Amend to License DPR-4 Re Installation of cartridge-type Filter in Purification Sys
ML20085D251
Person / Time
Site: Saxton File:GPU Nuclear icon.png
Issue date: 06/10/1963
From: Neidig R
SAXTON NUCLEAR EXPERIMENTAL CORP.
To:
Shared Package
ML20083L048 List: ... further results
References
FOIA-91-17 4214, NUDOCS 9110150370
Download: ML20085D251 (5)
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SAXTON tNCLEAR EXPERIMENTAL CORPORATION DOCKET NO. 50-lh6

  • LICENSE DPR-b CHAN3E REPORT #10
1. Applicant hereby submits Change Report #10 in conpliance with paragraph 3(B)(1) of License TER-h. This chango pertains to the installation of a filter in the purification system which was described in Subsection 207 of the Saxton Final Safeguards Report.

Pages 207.2 and 207.3, revisrd as of June b,1963, and figure 207-1, revised as of May 6, 1963, are attached to tnis Change Report #10.

SAXTON tWCLEAR EXPDlIMENTAL CORPORATION Dy /s/ R. E, Ne$ die Fresident Attests (S E A L) /ej/ R. E. Sypher ,

Secretary Sworn and taubscribed to besfore me this 10th day of June 1963

- 3.,

7: . ' / , ~; .

/s/ Charles J. Ausel f(' Notary Public

'O (S E A L)

Muhlenberg Township, Berks County

My Commission Expires Oct. lb, 1966

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l 9110150370 910424 PDR FOIA DEKOK?1-17 PDR IG 11.

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June h, 1963 Docket No. 50-lh6 DPR-L ,

Change Report #10  ;

1. Descriplien of Change A nine-element filter unit and by-pass valving has been installed in the purification system in series with, and just ahead of the existing demineralizer post filter. Revised pages 207 2, 207 3, dated June h, 1963,  !

and a revised Figure 207-1, dated May 6,1963, of the Saxton Final Safe-guards heport are attached to reflect this change.

2. Purport of Charge This added filter has a significantly larger area than the existing filter in order to facilitate the removal of solids from the main coolant nystem during system cican-ups.

3 Operating Proceduro The valving of the filters is arranged to permit both filters to be operated in series, the initially installed single-elettent filter to be operated alone, or both filters by-passed. During ciern-up operations l

' the filters will be operated in series. During normal operation the new nire-element filter may be by-passed.

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h. Conclusion l-l It is our conclusion that this change does not involve a change in the Technical Specifications or any unreviewed safety question and that the health and safety of the public will not be endangered by this change.

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207 2 the water passes through the purificatier. demineralizer during normal The cperation, or through the boric acid demineralizer after feed and bleed.

soluble corrosion products in the water are removed by ion exchange, and The the insoluble products are removed by the filter action of *ae resin bed.

demineralizer versels are installed as permanent units with provision for sluicing spent resins to the radioactive waste disposal facility. Sampling lines are provided both upstream and downstream of the domineralizers so that an indication of dcmineralizer efficiency can be obtained.

From the demineralizer, the purification water flows to the system post filters. During main coolant system clean-up operations the demineralizer The first filter, a nine-may be by-passed and both filters operated in series.

c1cnent, disposable type cartridge unit is used to remove solids which would otherwise rapidly clog the second filter, a singic-element unit which contains a porous, stainless steel element. During normal operation, the nine-element unit may be by-passed and the single-element unit used to remove any resin fines or other insoluble corrosion products which carry over from the demineralizers. FYom the filters the water is piped outside of the containment A vessel to the surge tank located in the control and auxiliary building.

hydrogen gas supply system is provided to maintain The surgea tank hydrogen sprayoverpressure nozzle spraysof approximately 15 psig in the surge tank.

the incoming water into the hydrogen atmosphere in the surge tank, where the hydrogen gas is absorbed by the water thereby providing corrosion inhibition.

In order to prevent an explosive mixture of hydrogen and oxygen from occurring in the surge tank, a nitrogen gas supply is provided to sweep the tank.

I Make-up water from the secondary plant is added at the surge tank through a valve that can be operated from the main control room. Chemicals required for plant operation are also added at the surge tank through the make-up water line. During the feed and bleed operation, water is discharged to the radioactive waste disposal facility through a manually operated valve.

The water flows from the surge tank into the charging system where i

' boric acid may be added from the chemical addition system and whereWhen the water the is pumped it.to the high }. essure line to the main coolant system.

reactor is operating at power, the pressurized water is passed through the shell side of the regenerative heat exchanger where it is heated to prevent thermal l

shock on the main coolent piping connection and it then is returned to the main coolant loop at the cold leg downstream of the main coolant circulating pump.

During hot shutdown, the purification system nonregenerative heat exchanger is used to remove decay heat. In addition, this 0 heat exchanger is used to reduce the main coolant water temperature to 300 F prior to placing the shutdown cooling system in operation. During these shutdown operations, the regenerative heat exchanger can be partially by-passed by three-way valve TIC-2hV which l

operates on a signal from T10-2h to automatically maintain the regenerative heat exchanger tube side outlet water temperature below 3000F.

C. Components

1. Regenerative Heat Dcchanger This unit is a horizontally mounted U-tute and abell type heat ex-changer. The tabes are welded to the tube sheet and the end closure is of a welded cap design. The tubes and all other material in contact with the main coolant water are Type 30h stainless s teel. The regene:.*ative neat exchangar $s designed for 2750 psig pr essure so thnt the relief valvo provided on the shc11 side of the heat exchanger may be set at a higher presstre than the main coolant safety valves, thereby allowing the :vessure of the main loop to be controlled

207 3 I

The unit is sized to remove b,500,000 Btu /hrwithatubeside inlet tempercture of 5200F, a tube side outlet temperature of 2h5DF, and a chell side inlet comperature of 1250F. ,

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2. Let-Down Flow Control Valve The let-down flow control valva is designed to control the flow through the purification system so that a constant average level is maintained in the pressurizer. It is a disphraps operated valve designed for 2000 psi at 5500F and a maximum open flow rate of 38 gpm.
3. Honregenerative Heat Fachanger This heat exchanger is a flanged head, horizontal, U-tubs and shell type unit. The tubes and all other surfaces in contact with the main coolant are Type 30h stainless steel. The ahen side and tube side of this unit are designad for 150 peig at 3000F. A liquid relief valve is provided on the shell side of the unit in accordance with code requirements.

The unit is designed to transfer heat at a rate of 1,800,000 Btu /hr with a tube side inlet temperature of 2h50F, a tube side0 outlet temperature of 1250F, and a shell side inlet temperature of 100 F.

h. Demineralizers Both domineralizer vessels are constructed of Type 30h stain-The design pressure for the less steel and contain 6 cubic feet of resin.

vessel shells is 150 psig at 3660F, The purification demineralizer contains a mix-ture of cation and anion resins containing one equivalent of lithium ions for each equivalent of hydroxide ions. The total exchange capacity of the unit is 72 kilograma expressed as calcium carbonate. The boric acid demineralizer contains an I anion resin which is in the OH form. The total exchange capacity of the unit is approximately 26 pounds of boric acid.

i l 5. Filter I Two filters are provided; a nine-element disposable cartridge type unit followed by a single-e3 nment unit. The bodies of both filtersTne are 300 Series stainless steel capable of withstanding 150 psi and 200 F.

nine-element filter elements are twisted fiber cartridges with stainless steel backup screens. The single-element filter uses a porous stainless steel element.

6. Surge Tank This tank is constructed of Type 30h stainless steel and is designed for 150 psig and 366"F. It is of all welded construction with the exception of the manhole which is flanged.

The tank has a volume of 75 cubic feet and is designed to contain that volume of water which is accumulated there during the maximum temperature rise in the main coolant system during normal plant operation.

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