ML20280A777
| ML20280A777 | |
| Person / Time | |
|---|---|
| Site: | 07201032, Holtec |
| Issue date: | 10/06/2020 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML20280A773 | List: |
| References | |
| 5014910 | |
| Download: ML20280A777 (1) | |
Text
Holtec Letter 5014910, Attachment 2 List of Previous Holtec Applications which Justify Use of Q/I
- 1. Holtec submitted a new MPC68M heat load pattern in HISTORM 100 Amendment 12 (Submittal - ML16169A363, Approved ML18279A002 ). Total heat load was higher (=42.8 kW, Table 4.III.3a of the LAR) than the approved pattern (=36.9 kW, Table 4.III.3a of the LAR). All calculations were reperformed with the new proposed pattern.
- 2. Holtec submitted a new MPC68M heat load pattern in HISTORM 100 Amendment 14 (Submittal ML18331A056, Approval ML19295C567). Total heat load was lower (=38.92 kW, Table 4.III.3a of the LAR) but per assembly decay heats were higher than the approved pattern
(=42.8 kW, Table 4.III.3a of the LAR) i.e. Q/I is bounded by that previously approved value. Long term storage calculation was performed with the new heat load pattern and PCT results were compared. Since the PCT was also lower (=703F, Table 4.III.3a of the LAR) than the previously approved value (=708F, Table 4.III.3a of the LAR) no additional calculations were performed with the new pattern. The same approach is also proposed in the topical report.
- 3. Holtec submitted new heat load patterns for MPC37 in HISTORM FW Amendment 5 (Submittal ML18179A100, Approval - ML20163A701). Total heat load was lower (=37.4 kW for MPC37, Table 1.2.3d of the LAR) but per assembly decay heats were higher than the approved pattern
(=44.09 kW for MPC37, Table 1.2.3a of the LAR) i.e. Q/I is bounded by that previously approved value. Longterm storage calculation was performed with the new heat load pattern and PCT results were compared. Since the PCT was also lower (=700F, Table 4.4.2 of the LAR) than the previously approved value (=703F, Table 4.4.3 of the LAR), no additional calculations were performed with the new patterns. The same approach is also proposed in the topical report.