melt-throughn.

Brit.

/ˈmɛltθruː/, U.S.

/ˈmɛltˌθru/

Origin: Formed within English, by compounding. Etymons: melt v.¹, through adv.

Etymology: < melt v.¹ + through adv. Compare earlier meltdown n.

In a nuclear reactor: melting of the shielding and containment structures as a result of overheating of the core. Cf. meltdown n. 1a.

ΚΠ

1974 Edwardsville (Illinois) Intelligencer 28 Feb. 4/5 Such a melt-through could spill hundreds of thousands of pounds of superhot radioactive debris into the primary containment vessel.

1982 Science 9 Apr. 132/2 The maximum ratio of noble gases to iodine released to the environment is given as 375 for the category of containment concrete base melt-through.

1986 Chicago Tribune (Nexis) 9 May 9 Roser said in a television interview Wednesday that the Soviets did not know whether a ‘melt-through’ had taken place.

1990 Sci. Amer. Sept. 95/2 New designs permit the ‘deterministic’ exclusion of catastrophic consequences such as a core melt-through.

This is a new entry (OED Third Edition, June 2001; most recently modified version published online March 2022).

单词	melt-through
释义	melt-throughn. Brit. /ˈmɛltθruː/, U.S. /ˈmɛltˌθru/ Origin: Formed within English, by compounding. Etymons: melt v.¹, through adv. Etymology: < melt v.¹ + through adv. Compare earlier meltdown n. In a nuclear reactor: melting of the shielding and containment structures as a result of overheating of the core. Cf. meltdown n. 1a. ΚΠ 1974 Edwardsville (Illinois) Intelligencer 28 Feb. 4/5 Such a melt-through could spill hundreds of thousands of pounds of superhot radioactive debris into the primary containment vessel. 1982 Science 9 Apr. 132/2 The maximum ratio of noble gases to iodine released to the environment is given as 375 for the category of containment concrete base melt-through. 1986 Chicago Tribune (Nexis) 9 May 9 Roser said in a television interview Wednesday that the Soviets did not know whether a ‘melt-through’ had taken place. 1990 Sci. Amer. Sept. 95/2 New designs permit the ‘deterministic’ exclusion of catastrophic consequences such as a core melt-through. This is a new entry (OED Third Edition, June 2001; most recently modified version published online March 2022). < n.1974
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