Nuclear atomically stores values. The closest thing to this in the stdlib is atomic.Pointer.

nuclear.go

import "sync"

type Nuclear[T any] struct {
	mu sync.RWMutex
	v  T
}

func NewNuclear[T any](v T) *Nuclear[T] {
	return &Nuclear{
		v: v,
	}
}

func (n *Nuclear[T]) Store(v T) {
	n.mu.Lock()
	defer n.mu.Unlock()
	n.v = v
}

func (n *Nuclear[T]) Load() T {
	n.mu.RLock()
	defer n.mu.RUnlock()
	return n.v
}