ML19312C649
| ML19312C649 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 10/30/1969 |
| From: | Rosen M US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Boyd R US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7912190857 | |
| Download: ML19312C649 (3) | |
Text
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- 1. S. Boyd, A/D for RP, DRL Th'tU:
S. Lovine, A/D for RT, DRL ADDITIO"X I'.GT3.A ION REQUIRED FOR OCONEZ NUCLZAR STATIONS 1.
For the design basis accident provide an accident chronology indi-cating the time at which the following events occur:
Design break Core flooding tanks start to inject water Containment reaches peak pressure Blowdown over Core flooding tanks empty SCCS starts
- Containment spray starts
- Containment heat removal fans start
- Contais:: vent spray water storage tank empties
- Assure no offsite power 2.
If energy is removed by the steam generators during blowdown, present a detailed analysis of the method used to calculate the heat removal.
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007 a n 99 3.
In order to evaluate the active heat removal systems, i.e., the fans and sprays, the following parametric data are required:
- 1) the effects of inlet water temperature and air flow rate on the heat removal capa-bility of the fans when the containment is at the peak pressure fol-lowing the design basis accident and 2) the heat removal capability of the fans as a function of the steamr-air mixture temperature. Provide similar information for the heat removal capability of the spray systems.
4.
Describe the codel and assumptions used to calculate the pressure build up in different containment compartments during the design basis accident.
5.
List the thermal dif fusivities of the structural heat sinks that was used in the containnent pressure transient analysis.
If various sur-faces are painted or treated in a :sanner that aight affect their heat transfer characteristics, describe how this is accounted for in the analysis.
6.
Provide an enern balance table that lists the energy stored prior to the DBA, the energy generated and absorbed from : = 0 sec. to the time of the peak pressure, and the energy distributed at the time of peak pressure for at least the folleving iteca:
Primary coolant internal anargy Core floodina tanks internal energy Energy
, ' in fuel and elsd Energy storou in core internals.
Reactor vessel metal energy Shutdown energy and decay heat Energr transfeu'ed to stesa generators Energy in piping, pumps, and valves Steam generator metal energy OFTICE >
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OCT a n 339 Secondary coolant internal energy Coutainment nir energy Contninnent steam energy Energy transferred to uteel structures Energy transferred to concrete structures 7.
In order to show a mass balance at any ti:ne in the pressure transient, plot the mass of water entering or leaving the sontains:ent free volume from such systems as the core flooding tanics, primary ecolant system, refueling water storage system and the containemnt coolina systaa.
Similarly, plot ene pounds /hr of scear olved from the design break area into the containment versus time.
Ahese plots should be for cases assuming the miniana conraiwat heat recoval ratas, ainimum ECCS capability, and the design basis accidcut break area.
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