ML19330B415
| ML19330B415 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/29/1980 |
| From: | Herbein J METROPOLITAN EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-05, TLL-337, NUDOCS 8008040006 | |
| Download: ML19330B415 (2) | |
Text
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f.Setronefitan Edison Corapany E I h I h3
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f Post Of ru.u bux 430 Middletown. Pennsyfvania 17057 A
717 944-4041 Water's Direct Dial Nurnber July 29,1980 TLL 337 Office of Inspection and Enforcement Attn:
B. H. Grier, Director Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pa.
19406
Dear Sir:
Three Mile Island Nuclear Station, Unit I (TMI-1l Operating License No. Drn-50 Docket No. 50-289 IE Bulletin 80-05 This letter is in response to IE Bulletin 80-05 concerning vacuum conditions resulting in damages to chemical volume control system holdup tanks.
We have reviewed the design of all systems that contain low pressure or holdup tanks that can be valved to contain primary system water to determine if adequate measures have been taken to protect against vacuum conditions.
Enclosed is a listing of the systems reviewed along with a table to indicate existing measures taken to protect gainst vacuum conditions.
Based on the results of this review, it has been determined that adequate safeguards exist on all tanks in the above stated categories to prevent harmful vacuum conditions from occurring.
Sincerely, E!8ned J. G. Herbein J. G. Herbein Vice President TMI-I JGH:DGM: hah Enclosure
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7 Enciccura 1 TLL 337 STATUS OF TMI-I TANKS TANK STATUS TANK 1
2 3
4 Reactor Coolant Bleed (WDL-T-1A,B,C)
X Caustic Mix (CA-T2)
X Lithium Hydroxide Mix (CA-T3)
X Core Flooding (CF-TIA,B)~
X Waste Gas Decay (WDG-TlA,B,C)
X Makeup (MU-TI)
X Sodium Hydroxide (BS-T2)
X Reactor Coolant Drain (WDL-T3)
X Misc. Waste Storage (WDL-T2)
X Used Pracoat (WDL-T5A,B)
K Reclaimed Boric Acid (WDL-T7A,B)
X Neutralizer Feed (WDL-T9)
X Waste Evap. Cond. Storage (WDL-TilA,B)
X Boric Acid Mix (CA-TI)
X Sodium Thiosulfate (BS-TI)
X Spent Rosin Storage (WDL-T4)
X Conc. Waste Storage (WDL-T6A,B)
X Neutralizer Waste Storage (WDL-T10)
X Laundry Waste (WDL-T12)
X Borated Water Storage (DH-TI)
X Neutralizer Mixing-(WDL-T8)
X Reclaimed Water Storage (CA-T6)
X Below are the categories under which the tanks have been grouped.
It has been determined that no action is required for the tanks falling into these categories.
l'.
Tank design external pressure exceeds 14.7 psi.
2.
Tank design external pressure exceeds expected vacuum conditions.
3.
Tanks have large openings to atmosphere.
4.
Tanks are vented to atmosphere or are connected to the loop seal vacuum relief systems.
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